Use upstream codex variables for diffs and red links

Bug: T361717
Bug: T363743
Change-Id: I4e49a07f9f092ab00e2b2d12fcb146c91a21d8d8

resources/skins.minerva.base.styles/CSSCustomProperties.less

@@ -23,10 +23,6 @@
 */
 .mixin-night-mode-palette() {
 	.cdx-mode-dark();
-	// <T361717>FIXME: These can be removed when T361717 is resolved.
-	--minerva-diff-deletedline: #886525;
-	--minerva-diff-addedline: #36c;
-	// </T361717>
 }
 
 /**
@@ -53,10 +49,6 @@
 .skin-invert,
 .notheme {
 	.cdx-mode-reset();
-	// <T361717>FIXME: These can be removed when T361717 is resolved.
-	--minerva-diff-addedline: @color-success;
-	--minerva-diff-deletedline: @color-destructive;
-	// </T361717>
 }
 
 .skin-invert,
@@ -73,9 +65,6 @@
 html.skin-theme-clientpref-night {
 	color-scheme: dark;
 	.mixin-night-mode-palette();
-	// T363911 Temporarily override Codex variable for Vector night mode release
-	// Remove after task has been resolved and new color is available in Codex.
-	--color-link-red: #b97876;
 
 	.skin-invert,
 	.skin-invert-image img,
@@ -104,9 +93,6 @@ html.skin-theme-clientpref-night {
 	html.skin-theme-clientpref-os {
 		color-scheme: light dark;
 		.mixin-night-mode-palette();
-		// T363911 Temporarily override Codex variable for Vector night mode release
-		// Remove after task has been resolved and new color is available in Codex.
-		--color-link-red: #b97876;
 
 		.skin-invert,
 		.skin-invert-image img,

skinStyles/mediawiki.special.changeslist.less

@@ -85,15 +85,15 @@ ul.mw-contributions-list li > * {
  * Colored watchlist and recent changes numbers.
  */
 .mw-plusminus-pos {
-	color: var( --minerva-diff-addedline );
+	color: @color-content-added;
 }
 
 .mw-plusminus-neg {
-	color: var( --minerva-diff-deletedline );
+	color: @color-content-removed;
 }
 
 .mw-plusminus-null {
-	color: @color-subtle;
+	color: @color-disabled;
 }
 
 /*