Drop support for MW 1.40

Bug: T369064
Change-Id: Id3dde7df0fe963a35c68ff5b6bdf56a268eacc6e

resources/js/ext.uls.interface.js

@@ -196,9 +196,7 @@
 	}
 
 	function userCanChangeLanguage() {
-		return mw.config.get( 'wgULSAnonCanChangeLanguage' ) ||
-			// mw.user.isNamed() added in MW 1.40. Remove after MLEB drop support for MW < 1.40
-			( typeof mw.user.isNamed === 'function' ? mw.user.isNamed() : !mw.user.isAnon() );
+		return mw.config.get( 'wgULSAnonCanChangeLanguage' ) || mw.user.isNamed();
 	}
 
 	/**