Remove support for MediaWiki 1.29 and earlier

extension.json already requires "MediaWiki": ">= 1.30.0".

Change-Id: Ic460e6364967cd7b0367e66f613077c424bd8f19

resources/js/ext.uls.interface.js

@@ -133,16 +133,7 @@
 		}
 
 		function showTipsy( timeout ) {
-			var offset, tipsyTimer = 0;
-
-			// BC for MW 1.27
-			if ( ulsPopup.setFloatableContainer === undefined ) {
-				offset = $ulsTrigger.offset();
-				ulsPopup.$element.css( {
-					top: offset.top + 24,
-					left: offset.left + $ulsTrigger.outerWidth() / 2
-				} );
-			}
+			var tipsyTimer = 0;
 
 			ulsPopup.toggle( true );
 			ulsPopup.toggleClipping( false );