remove deprecated features

Author: xabbuh

Loader/YamlFileLoader.php

@@ -57,18 +57,10 @@ public function load($file, $type = null)
             $this->yamlParser = new YamlParser();
         }
 
-        $prevErrorHandler = set_error_handler(function ($level, $message, $script, $line) use ($file, &$prevErrorHandler) {
-            $message = E_USER_DEPRECATED === $level ? preg_replace('/ on line \d+/', ' in "'.$file.'"$0', $message) : $message;
-
-            return $prevErrorHandler ? $prevErrorHandler($level, $message, $script, $line) : false;
-        });
-
         try {
             $parsedConfig = $this->yamlParser->parseFile($path);
         } catch (ParseException $e) {
             throw new \InvalidArgumentException(sprintf('The file "%s" does not contain valid YAML.', $path), 0, $e);
-        } finally {
-            restore_error_handler();
         }
 
         $collection = new RouteCollection();