Remove 'legacy' feature

Bug: T287410
Change-Id: Ibf8c20cfb1c3adb262224a28488c03c64323f509

bundlesize.config.json

@@ -1,7 +1,7 @@
 [
 	{
 		"resourceModule": "skins.vector.styles.legacy",
-		"maxSize": "9 kB"
+		"maxSize": "7.7 kB"
 	},
 	{
 		"resourceModule": "skins.vector.styles",

resources/skins.vector.styles.legacy/layouts/print.less

@@ -0,0 +1,37 @@
+/**
+ * Print styles previously provided by the deprecated `legacy` feature (T287410)
+ * Copied from mediawiki.skinning/commonPrint.less in Mediawiki 1.36 core
+ */
+
+/**
+ * Hide all the elements irrelevant for printing
+ * Skins however can and should override.
+ */
+/* General hide-in-print class, please only use sparely */
+.noprint,
+/* Various content classes, in alphabetical order */
+.mw-cite-backlink,
+.mw-redirectedfrom,
+.patrollink,
+/* Various content ids, in alphabetical order */
+#column-one,
+#footer-places,
+#mw-navigation,
+/* Deprecated, changed in core */
+#f-poweredbyico,
+#f-copyrightico,
+li#about,
+li#disclaimer,
+li#mobileview,
+li#privacy {
+	display: none;
+}
+
+#footer {
+	background: #fff;
+	color: #000;
+	margin-top: 1em;
+	border-top: 1pt solid #aaa;
+	padding-top: 5px;
+	direction: ltr;
+}

resources/skins.vector.styles.legacy/layouts/screen.less

@@ -183,3 +183,18 @@ body {
 		right: 1em;
 	}
 }
+
+// Directionality styles previously provided by the deprecated `legacy` feature (T287410)
+// for HTML elements which do not carry dir HTML attributes.
+// These have been copied across to legacy Vector to minimize disruption caused by T287701.
+// If you are reading this comment in 2022, please consider checking usage in wikitext and
+// removing them both.
+.mw-content-ltr {
+	/* @noflip */
+	direction: ltr;
+}
+
+.mw-content-rtl {
+	/* @noflip */
+	direction: rtl;
+}

resources/skins.vector.styles.legacy/skin-legacy.less

@@ -12,3 +12,7 @@
 	@import './components/Sidebar.less';
 	@import './components/UserLinks.less';
 }
+
+@media print {
+	@import './layouts/print.less';
+}

skin.json

@@ -107,10 +107,17 @@
 			"features": {
 				"normalize": true,
 				"elements": true,
-				"content": true,
-				"interface": true,
 				"logo": true,
-				"legacy": true
+				"content": true,
+				"content-links": true,
+				"content-thumbnails": true,
+				"interface": true,
+				"interface-message-box": true,
+				"interface-category": true,
+				"content-tables": true,
+				"i18n-ordered-lists": true,
+				"i18n-all-lists-margins": true,
+				"i18n-headings": true
 			},
 			"targets": [
 				"desktop",