Coding standards and Cosmetics

Processing feedback given by @stof and @Seldaek.

src/Composer/Repository/RepositoryInterface.php

@@ -57,13 +57,4 @@ interface RepositoryInterface extends \Countable
      * @return  array
      */
     function getPackages();
-
-    /**
-     * Removes a package from the repository.
-     *
-     * @abstract
-     * @param       \Composer\Package\PackageInterface  $package
-     * @return      void
-     */
-    function removePackage(PackageInterface $package);
 }

src/Composer/Repository/RepositoryManager.php

@@ -165,7 +165,7 @@ class RepositoryManager
     /**
      * Returns all local repositories for the project.
      *
-     * @return  array[RepositoryInterface]
+     * @return  array[WritableRepositoryInterface]
      */
     public function getLocalRepositories()
     {