remove deprecated features

Author: xabbuh

Loader/YamlFileLoader.php

@@ -38,18 +38,10 @@ protected function loadResource($resource)
             $this->yamlParser = new YamlParser();
         }
 
-        $prevErrorHandler = set_error_handler(function ($level, $message, $script, $line) use ($resource, &$prevErrorHandler) {
-            $message = E_USER_DEPRECATED === $level ? preg_replace('/ on line \d+/', ' in "'.$resource.'"$0', $message) : $message;
-
-            return $prevErrorHandler ? $prevErrorHandler($level, $message, $script, $line) : false;
-        });
-
         try {
             $messages = $this->yamlParser->parseFile($resource);
         } catch (ParseException $e) {
             throw new InvalidResourceException(sprintf('Error parsing YAML, invalid file "%s"', $resource), 0, $e);
-        } finally {
-            restore_error_handler();
         }
 
         return $messages;