reverting lib-level file:// support due to being supported by PHP itself

Author: vearutop

src/RemoteRef/BasicFetcher.php

@@ -8,9 +8,6 @@ class BasicFetcher implements RemoteRefProvider
 {
     public function getSchemaData($url)
     {
-        if (strtolower(substr($url, 0, 7)) === 'file://') {
-            $url = substr($url, 7);
-        }
         return json_decode(file_get_contents($url));
     }
 }