Merge jquery.webfonts into ext.uls.webfonts.repository

The two modules are always loaded together and don't need
separate entry points.

Additionally, this makes the ext.uls.webfonts.fonts
just depend on the ext.uls.webfonts.repository module
and not do anything else, so remove it in favor of
referencing ext.uls.webfonts.repository directly where
needed.

Bug: T292042
Change-Id: I067b9eda923fcb0d5da0ed80030356f1f747259b

resources/js/ext.uls.displaysettings.js

@@ -122,7 +122,7 @@
 		 */
 		setupWebFonts: function () {
 			var d = $.Deferred();
-			mw.loader.using( [ 'ext.uls.webfonts.fonts' ] ).then( function () {
+			mw.loader.using( [ 'ext.uls.webfonts.repository' ] ).then( function () {
 				if ( this.isWebFontsEnabled ) {
 					mw.webfonts.setup();
 				}

resources/js/ext.uls.webfonts.js

@@ -137,7 +137,7 @@
 		if ( mw.webfonts.preferences.isEnabled() ) {
 			// Queue to next idle period to optimize loading.
 			mw.requestIdleCallback( function () {
-				mw.loader.using( 'ext.uls.webfonts.fonts' ).then( mw.webfonts.setup );
+				mw.loader.using( 'ext.uls.webfonts.repository' ).then( mw.webfonts.setup );
 			} );
 		}
 	} );