Remove php entry point

Bug: T140007
Change-Id: I12de8991f37aee9684734f5ccf672173f0a9e93f

Vector.php

@@ -1,14 +0,0 @@
-<?php
-
-if ( function_exists( 'wfLoadSkin' ) ) {
-	wfLoadSkin( 'Vector' );
-	// Keep i18n globals so mergeMessageFileList.php doesn't break
-	$wgMessagesDirs['Vector'] = __DIR__ . '/i18n';
-	/* wfWarn(
-		'Deprecated PHP entry point used for Vector skin. Please use wfLoadSkin instead, ' .
-		'see https://www.mediawiki.org/wiki/Extension_registration for more details.'
-	); */
-	return true;
-} else {
-	die( 'This version of the Vector skin requires MediaWiki 1.25+' );
-}