mediawiki.util: Remove redundant file closures

Modules loaded with packageFiles are always executed in module scope
(with a closure), even in debug mode.

The behaviour of non-packageFiles debug mode is the only reason files
have closures.

Bug: T50886
Change-Id: I4c553961eab0f665e4ae123e11c92b255367fcfb

resources/src/mediawiki.util/.eslintrc.json

@@ -0,0 +1,5 @@
+{
+	"parserOptions": {
+		"sourceType": "module"
+	}
+}

resources/src/mediawiki.util/jquery.accessKeyLabel.js

@@ -3,7 +3,6 @@
  *
  * @class jQuery.plugin.accessKeyLabel
  */
-( function () {
 
 // Cached access key modifiers for used browser
 var cachedAccessKeyModifiers,
@@ -235,5 +234,3 @@
  * @class jQuery
  * @mixins jQuery.plugin.accessKeyLabel
  */
-
-}() );

resources/src/mediawiki.util/util.js

@@ -1,4 +1,3 @@
-( function () {
 'use strict';
 
 var util,
@@ -579,5 +578,3 @@
 
 mw.util = util;
 module.exports = util;
-
-}() );