remove php-cs-fixer config file

.php_cs

@@ -1,15 +0,0 @@
-<?php
-$finder = PhpCsFixer\Finder::create()
-    ->exclude('vendor')
-	->exclude('node_modules')
-	->exclude('bin')
-    ->in(__DIR__)
-;
-
-return PhpCsFixer\Config::create()
-    ->setRules([
-        'native_function_invocation' => ['include' => ['@all']],
-		'native_constant_invocation' => true,
-    ])
-    ->setFinder($finder)
-;