Cleanup @return annotations

Author: nicolas-grekas

Authentication/AuthenticationManagerInterface.php

@@ -27,7 +27,7 @@ interface AuthenticationManagerInterface
     /**
      * Attempts to authenticate a TokenInterface object.
      *
-     * @return TokenInterface An authenticated TokenInterface instance, never null
+     * @return TokenInterface
      *
      * @throws AuthenticationException if the authentication fails
      */

Authentication/Token/Storage/TokenStorageInterface.php

@@ -23,7 +23,7 @@ interface TokenStorageInterface
     /**
      * Returns the current security token.
      *
-     * @return TokenInterface|null A TokenInterface instance or null if no authentication information is available
+     * @return TokenInterface|null
      */
     public function getToken();