rails/rails — pull request #10836 by kennyj (2013-06-04 12:12:18+00:00)
Title: Fix #10789. Now at last ::Logger doesn't support #silence method .

Closes #10789.

Now `::Logger` hasn't `silence` method, because `::Logger` doesn't include `LoggerSilence`.

This PR also should be backported to 4-0-stable.