Remove deprecated PHP entry point

Directly use

	wfLoadExtension( 'UniversalLanguageSelector' );

in LocalSettings.php instead.

Change-Id: I4739cabd03c106ba527c06d85fea01c7513e9d3c

UniversalLanguageSelector.php

@@ -1,33 +0,0 @@
-<?php
-/**
- * Initialisation file for MediaWiki extension UniversalLanguageSelector.
- *
- * Copyright (C) 2012-2018 Alolita Sharma, Amir Aharoni, Arun Ganesh, Brandon
- * Harris, Niklas Laxström, Pau Giner, Santhosh Thottingal, Siebrand Mazeland
- * and other contributors. See CREDITS for a list.
- *
- * UniversalLanguageSelector is dual licensed GPLv2 or later and MIT. You don't
- * have to do anything special to choose one license or the other and you don't
- * have to notify anyone which license you are using. You are free to use
- * UniversalLanguageSelector in commercial projects as long as the copyright
- * header is left intact. See files GPL-LICENSE and MIT-LICENSE for details.
- *
- * @file
- * @ingroup Extensions
- * @license GPL-2.0-or-later
- * @license MIT
- */
-
-if ( function_exists( 'wfLoadExtension' ) ) {
-	wfLoadExtension( 'UniversalLanguageSelector' );
-	// Keep i18n globals so mergeMessageFileList.php doesn't break
-	$wgMessagesDirs['UniversalLanguageSelector'] = __DIR__ . '/i18n';
-	wfWarn(
-		'Deprecated PHP entry point used for UniversalLanguageSelector extension. ' .
-		'Please use wfLoadExtension instead, ' .
-		'see https://www.mediawiki.org/wiki/Extension_registration for more details.'
-	);
-	return;
-} else {
-	die( 'Universal Language Selector extension requires MediaWiki 1.25 or later' );
-}