Merge branch '4.3' into 4.4

* 4.3:
  [4.3] Remove unused local variables

Author: nicolas-grekas

Parser.php

@@ -85,7 +85,6 @@ public function parse(string $value, int $flags = 0)
         $this->refs = [];
 
         $mbEncoding = null;
-        $data = null;
 
         if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
             $mbEncoding = mb_internal_encoding();