diff --git a/wp-includes/js/jquery/jquery.postmessage.dev.js b/wp-includes/js/jquery/jquery.postmessage.dev.js
deleted file mode 100644
index 33b5d92ae..000000000
--- a/wp-includes/js/jquery/jquery.postmessage.dev.js
+++ /dev/null
@@ -1,222 +0,0 @@
-/*!
- * jQuery postMessage - v0.5 - 9/11/2009
- * http://benalman.com/projects/jquery-postmessage-plugin/
- *
- * Copyright (c) 2009 "Cowboy" Ben Alman
- * Dual licensed under the MIT and GPL licenses.
- * http://benalman.com/about/license/
- */
-
-// Script: jQuery postMessage: Cross-domain scripting goodness
-//
-// *Version: 0.5, Last updated: 9/11/2009*
-//
-// Project Home - http://benalman.com/projects/jquery-postmessage-plugin/
-// GitHub       - http://github.com/cowboy/jquery-postmessage/
-// Source       - http://github.com/cowboy/jquery-postmessage/raw/master/jquery.ba-postmessage.js
-// (Minified)   - http://github.com/cowboy/jquery-postmessage/raw/master/jquery.ba-postmessage.min.js (0.9kb)
-//
-// About: License
-//
-// Copyright (c) 2009 "Cowboy" Ben Alman,
-// Dual licensed under the MIT and GPL licenses.
-// http://benalman.com/about/license/
-//
-// About: Examples
-//
-// This working example, complete with fully commented code, illustrates one
-// way in which this plugin can be used.
-//
-// Iframe resizing - http://benalman.com/code/projects/jquery-postmessage/examples/iframe/
-//
-// About: Support and Testing
-//
-// Information about what version or versions of jQuery this plugin has been
-// tested with and what browsers it has been tested in.
-//
-// jQuery Versions - 1.3.2
-// Browsers Tested - Internet Explorer 6-8, Firefox 3, Safari 3-4, Chrome, Opera 9.
-//
-// About: Release History
-//
-// 0.5 - (9/11/2009) Improved cache-busting
-// 0.4 - (8/25/2009) Initial release
-
-(function($){
-  '$:nomunge'; // Used by YUI compressor.
-
-  // A few vars used in non-awesome browsers.
-  var interval_id,
-    last_hash,
-    cache_bust = 1,
-
-    // A var used in awesome browsers.
-    rm_callback,
-
-    // A few convenient shortcuts.
-    window = this,
-    FALSE = !1,
-
-    // Reused internal strings.
-    postMessage = 'postMessage',
-    addEventListener = 'addEventListener',
-
-    p_receiveMessage,
-
-    // I couldn't get window.postMessage to actually work in Opera 9.64!
-    has_postMessage = window[postMessage] && !$.browser.opera;
-
-  // Method: jQuery.postMessage
-  //
-  // This method will call window.postMessage if available, setting the
-  // targetOrigin parameter to the base of the target_url parameter for maximum
-  // security in browsers that support it. If window.postMessage is not available,
-  // the target window's location.hash will be used to pass the message. If an
-  // object is passed as the message param, it will be serialized into a string
-  // using the jQuery.param method.
-  //
-  // Usage:
-  //
-  // > jQuery.postMessage( message, target_url [, target ] );
-  //
-  // Arguments:
-  //
-  //  message - (String) A message to be passed to the other frame.
-  //  message - (Object) An object to be serialized into a params string, using
-  //    the jQuery.param method.
-  //  target_url - (String) The URL of the other frame this window is
-  //    attempting to communicate with. This must be the exact URL (including
-  //    any query string) of the other window for this script to work in
-  //    browsers that don't support window.postMessage.
-  //  target - (Object) A reference to the other frame this window is
-  //    attempting to communicate with. If omitted, defaults to `parent`.
-  //
-  // Returns:
-  //
-  //  Nothing.
-
-  $[postMessage] = function( message, target_url, target ) {
-    if ( !target_url ) { return; }
-
-    // Serialize the message if not a string. Note that this is the only real
-    // jQuery dependency for this script. If removed, this script could be
-    // written as very basic JavaScript.
-    message = typeof message === 'string' ? message : $.param( message );
-
-    // Default to parent if unspecified.
-    target = target || parent;
-
-    if ( has_postMessage ) {
-      // The browser supports window.postMessage, so call it with a targetOrigin
-      // set appropriately, based on the target_url parameter.
-      target[postMessage]( message, target_url.replace( /([^:]+:\/\/[^\/]+).*/, '$1' ) );
-
-    } else if ( target_url ) {
-      // The browser does not support window.postMessage, so set the location
-      // of the target to target_url#message. A bit ugly, but it works! A cache
-      // bust parameter is added to ensure that repeat messages trigger the
-      // callback.
-      target.location = target_url.replace( /#.*$/, '' ) + '#' + (+new Date) + (cache_bust++) + '&' + message;
-    }
-  };
-
-  // Method: jQuery.receiveMessage
-  //
-  // Register a single callback for either a window.postMessage call, if
-  // supported, or if unsupported, for any change in the current window
-  // location.hash. If window.postMessage is supported and source_origin is
-  // specified, the source window will be checked against this for maximum
-  // security. If window.postMessage is unsupported, a polling loop will be
-  // started to watch for changes to the location.hash.
-  //
-  // Note that for simplicity's sake, only a single callback can be registered
-  // at one time. Passing no params will unbind this event (or stop the polling
-  // loop), and calling this method a second time with another callback will
-  // unbind the event (or stop the polling loop) first, before binding the new
-  // callback.
-  //
-  // Also note that if window.postMessage is available, the optional
-  // source_origin param will be used to test the event.origin property. From
-  // the MDC window.postMessage docs: This string is the concatenation of the
-  // protocol and "://", the host name if one exists, and ":" followed by a port
-  // number if a port is present and differs from the default port for the given
-  // protocol. Examples of typical origins are https://example.org (implying
-  // port 443), http://example.net (implying port 80), and http://example.com:8080.
-  //
-  // Usage:
-  //
-  // > jQuery.receiveMessage( callback [, source_origin ] [, delay ] );
-  //
-  // Arguments:
-  //
-  //  callback - (Function) This callback will execute whenever a <jQuery.postMessage>
-  //    message is received, provided the source_origin matches. If callback is
-  //    omitted, any existing receiveMessage event bind or polling loop will be
-  //    canceled.
-  //  source_origin - (String) If window.postMessage is available and this value
-  //    is not equal to the event.origin property, the callback will not be
-  //    called.
-  //  source_origin - (Function) If window.postMessage is available and this
-  //    function returns false when passed the event.origin property, the
-  //    callback will not be called.
-  //  delay - (Number) An optional zero-or-greater delay in milliseconds at
-  //    which the polling loop will execute (for browser that don't support
-  //    window.postMessage). If omitted, defaults to 100.
-  //
-  // Returns:
-  //
-  //  Nothing!
-
-  $.receiveMessage = p_receiveMessage = function( callback, source_origin, delay ) {
-    if ( has_postMessage ) {
-      // Since the browser supports window.postMessage, the callback will be
-      // bound to the actual event associated with window.postMessage.
-
-      if ( callback ) {
-        // Unbind an existing callback if it exists.
-        rm_callback && p_receiveMessage();
-
-        // Bind the callback. A reference to the callback is stored for ease of
-        // unbinding.
-        rm_callback = function(e) {
-          if ( ( typeof source_origin === 'string' && e.origin !== source_origin )
-            || ( $.isFunction( source_origin ) && source_origin( e.origin ) === FALSE ) ) {
-            return FALSE;
-          }
-          callback( e );
-        };
-      }
-
-      if ( window[addEventListener] ) {
-        window[ callback ? addEventListener : 'removeEventListener' ]( 'message', rm_callback, FALSE );
-      } else {
-        window[ callback ? 'attachEvent' : 'detachEvent' ]( 'onmessage', rm_callback );
-      }
-
-    } else {
-      // Since the browser sucks, a polling loop will be started, and the
-      // callback will be called whenever the location.hash changes.
-
-      interval_id && clearInterval( interval_id );
-      interval_id = null;
-
-      if ( callback ) {
-        delay = typeof source_origin === 'number'
-          ? source_origin
-          : typeof delay === 'number'
-            ? delay
-            : 100;
-
-        interval_id = setInterval(function(){
-          var hash = document.location.hash,
-            re = /^#?\d+&/;
-          if ( hash !== last_hash && re.test( hash ) ) {
-            last_hash = hash;
-            callback({ data: hash.replace( re, '' ) });
-          }
-        }, delay );
-      }
-    }
-  };
-
-})(jQuery);
diff --git a/wp-includes/js/jquery/jquery.postmessage.js b/wp-includes/js/jquery/jquery.postmessage.js
deleted file mode 100644
index 336906e18..000000000
--- a/wp-includes/js/jquery/jquery.postmessage.js
+++ /dev/null
@@ -1,9 +0,0 @@
-/*!
- * jQuery postMessage - v0.5 - 9/11/2009
- * http://benalman.com/projects/jquery-postmessage-plugin/
- *
- * Copyright (c) 2009 "Cowboy" Ben Alman
- * Dual licensed under the MIT and GPL licenses.
- * http://benalman.com/about/license/
- */
-(function($){var b,d,j=1,a,f=this,g=!1,h="postMessage",c="addEventListener",e,i=f[h]&&!$.browser.opera;$[h]=function(k,m,l){if(!m){return}k=typeof k==="string"?k:$.param(k);l=l||parent;if(i){l[h](k,m.replace(/([^:]+:\/\/[^\/]+).*/,"$1"))}else{if(m){l.location=m.replace(/#.*$/,"")+"#"+(+new Date)+(j++)+"&"+k}}};$.receiveMessage=e=function(m,l,k){if(i){if(m){a&&e();a=function(n){if((typeof l==="string"&&n.origin!==l)||($.isFunction(l)&&l(n.origin)===g)){return g}m(n)}}if(f[c]){f[m?c:"removeEventListener"]("message",a,g)}else{f[m?"attachEvent":"detachEvent"]("onmessage",a)}}else{b&&clearInterval(b);b=null;if(m){k=typeof l==="number"?l:typeof k==="number"?k:100;b=setInterval(function(){var o=document.location.hash,n=/^#?\d+&/;if(o!==d&&n.test(o)){d=o;m({data:o.replace(n,"")})}},k)}}}})(jQuery);
\ No newline at end of file
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 3497d51b1..1567b9b5b 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -167,7 +167,6 @@ function wp_default_scripts( &$scripts ) {
 	$scripts->add( 'jquery-serialize-object', "/wp-includes/js/jquery/jquery.serialize-object.js", array('jquery'), '0.2', 1 );
 	$scripts->add( 'jquery-hotkeys', "/wp-includes/js/jquery/jquery.hotkeys$suffix.js", array('jquery'), '0.0.2m', 1 );
 	$scripts->add( 'jquery-table-hotkeys', "/wp-includes/js/jquery/jquery.table-hotkeys$suffix.js", array('jquery', 'jquery-hotkeys'), false, 1 );
-	$scripts->add( 'jquery-postmessage', "/wp-includes/js/jquery/jquery.postmessage$suffix.js", array('jquery'), '0.5', 1 );
 	$scripts->add( 'jquery-touch-punch', "/wp-includes/js/jquery/jquery.ui.touch-punch$suffix.js", array('jquery-ui-widget', 'jquery-ui-mouse'), '0.2.2', 1 );
 
 	$scripts->add( 'thickbox', "/wp-includes/js/thickbox/thickbox.js", array('jquery'), '3.1-20111117', 1 );
@@ -298,7 +297,7 @@ function wp_default_scripts( &$scripts ) {
 
 	$scripts->add( 'hoverIntent', "/wp-includes/js/hoverIntent$suffix.js", array('jquery'), 'r6', 1 );
 
-	$scripts->add( 'customize-base',     "/wp-includes/js/customize-base$suffix.js",     array( 'jquery-postmessage', 'json2' ), false, 1 );
+	$scripts->add( 'customize-base',     "/wp-includes/js/customize-base$suffix.js",     array( 'jquery', 'json2' ), false, 1 );
 	$scripts->add( 'customize-loader',   "/wp-includes/js/customize-loader$suffix.js",   array( 'customize-base' ), false, 1 );
 	$scripts->add( 'customize-controls', "/wp-includes/js/customize-controls$suffix.js", array( 'customize-base' ), false, 1 );
 	$scripts->add( 'customize-preview',  "/wp-includes/js/customize-preview$suffix.js",  array( 'customize-base' ), false, 1 );