Remove falesly introduced RTL version of 'search' icon

It's not useful to mirror it for RTL languages, as it's a real world
object metaphor and is held in right hand for most users, no matter
what language. Sorry, left-hand users. Unify with Design Style Guide
search icon treatment.

Bug: T228435
Change-Id: I9ff688e4be801779a84b1026ca57cfb50209b53d

components/search.less

@@ -101,7 +101,7 @@
 }
 
 #searchButton {
-	.background-image-svg( 'images/search-ltr.svg', 'images/search-ltr.png' );
+	.background-image-svg( 'images/search.svg', 'images/search.png' );
 	background-position: center center;
 	background-repeat: no-repeat;
 }

images/search-rtl.svg

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<svg xmlns="http://www.w3.org/2000/svg" width="12" height="13">
-	<g fill="none" stroke="#54595d" stroke-width="2">
-		<path d="M.71 11.71l4-4"/>
-		<circle cx="7" cy="5" r="4"/>
-	</g>
-</svg>