Cleanup more @return annotations

Author: nicolas-grekas

Cache/CacheInterface.php

@@ -38,7 +38,7 @@ interface CacheInterface
      *                                              See https://en.wikipedia.org/wiki/Cache_stampede#Probabilistic_early_expiration
      * @param array                      &$metadata The metadata of the cached item {@see ItemInterface::getMetadata()}
      *
-     * @return mixed The value corresponding to the provided key
+     * @return mixed
      *
      * @throws InvalidArgumentException When $key is not valid or when $beta is negative
      */

Translation/LocaleAwareInterface.php

@@ -25,7 +25,7 @@ public function setLocale(string $locale);
     /**
      * Returns the current locale.
      *
-     * @return string The locale
+     * @return string
      */
     public function getLocale();
 }

Translation/TranslatorInterface.php

@@ -59,7 +59,7 @@ interface TranslatorInterface
      * @param string|null $domain     The domain for the message or null to use the default
      * @param string|null $locale     The locale or null to use the default
      *
-     * @return string The translated string
+     * @return string
      *
      * @throws \InvalidArgumentException If the locale contains invalid characters
      */