minor #24664 [2.8] Fix some docblocks (nicolas-grekas)

This PR was merged into the 2.8 branch.

Discussion
----------

[2.8] Fix some docblocks

| Q             | A
| ------------- | ---
| Branch?       | 2.8
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
-------

1cfd7de [2.8] Fix some docblocks

src/Symfony/Component/Routing/RouteCollectionBuilder.php

@@ -38,9 +38,6 @@ class RouteCollectionBuilder
     private $methods;
     private $resources = array();
 
-    /**
-     * @param LoaderInterface $loader
-     */
     public function __construct(LoaderInterface $loader = null)
     {
         $this->loader = $loader;

src/Symfony/Component/Security/Guard/GuardAuthenticatorHandler.php

@@ -44,9 +44,6 @@ class GuardAuthenticatorHandler
 
     /**
      * Authenticates the given token in the system.
-     *
-     * @param TokenInterface $token
-     * @param Request        $request
      */
     public function authenticateWithToken(TokenInterface $token, Request $request)
     {

src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php

@@ -13,6 +13,7 @@ namespace Symfony\Component\Serializer\Tests\Encoder;
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Encoder\ChainEncoder;
+use Symfony\Component\Serializer\Encoder\EncoderInterface;
 use Symfony\Component\Serializer\Encoder\NormalizationAwareInterface;
 
 class ChainEncoderTest extends TestCase
@@ -121,10 +122,14 @@ class ChainNormalizationAwareEncoder extends ChainEncoder implements Normalizati
 {
 }
 
-class NormalizationAwareEncoder implements NormalizationAwareInterface
+class NormalizationAwareEncoder implements EncoderInterface, NormalizationAwareInterface
 {
     public function supportsEncoding($format)
     {
         return true;
     }
+
+    public function encode($data, $format, array $context = array())
+    {
+    }
 }