removal of unnecessary file, and composer update

vendor/symfony/process/Process.php

@@ -1309,7 +1309,7 @@ class Process implements \IteratorAggregate
         if ($this->outputDisabled) {
             return function ($type, $data) use ($callback) {
                 if (null !== $callback) {
-                    return \call_user_func($callback, $type, $data);
+                    return $callback($type, $data);
                 }
             };
         }
@@ -1324,7 +1324,7 @@ class Process implements \IteratorAggregate
             }
 
             if (null !== $callback) {
-                return \call_user_func($callback, $type, $data);
+                return $callback($type, $data);
             }
         };
     }