minor symfony#15288 [DependencyInjection] Remove unused code in XmlFileLoader (dunglas)

This PR was merged into the 2.3 branch.

Discussion
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[DependencyInjection] Remove unused code in XmlFileLoader

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Commits
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7fa79da [DependencyInjection] Remove unused code in XmlFileLoader

Author: fabpot

src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php

@@ -48,7 +48,7 @@ public function load($resource, $type = null)
         $this->parseImports($xml, $path);
 
         // parameters
-        $this->parseParameters($xml, $path);
+        $this->parseParameters($xml);
 
         // extensions
         $this->loadFromExtensions($xml);
@@ -69,9 +69,8 @@ public function supports($resource, $type = null)
      * Parses parameters.
      *
      * @param SimpleXMLElement $xml
-     * @param string           $file
      */
-    private function parseParameters(SimpleXMLElement $xml, $file)
+    private function parseParameters(SimpleXMLElement $xml)
     {
         if (!$xml->parameters) {
             return;