merged branch Tobion/cacheclear-deprecated-method (PR #8132)

This PR was merged into the 2.3 branch.

Discussion
----------

[FrameworkBundle] removed deprecated method from cache:clear command

bc break: no
test pass: yes

Commits
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024bd9e [FrameworkBundle] removed deprecated method from cache:clear command

src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php

@@ -141,14 +141,6 @@ EOF
         }
     }
 
-    /**
-     * @deprecated to be removed in 2.3
-     */
-    protected function getTempSuffix()
-    {
-        return '';
-    }
-
     /**
      * @param KernelInterface $parent
      * @param string          $namespace