Don't log lost connection retries

Summary:
In D1460, we added initial-connection retries and additional logging in response to network/router instability at Facebook.

One of these logs occurs normally, though, when daemons get disconnected by 'wait_timeout' settings. This is noisy for a lot of installs and a few people have asked me about it.

I assume the situation has cleared up a bit at Facebook, so we can remove the "business as usual" log and keep error logs quieter for general installs?

Test Plan: Weathered the support storm.

Reviewers: nh, vrana

Reviewed By: nh

CC: Makinde, aran

Differential Revision: https://secure.phabricator.com/D2736

src/storage/connection/mysql/AphrontMySQLDatabaseConnectionBase.php

@@ -199,10 +199,6 @@ abstract class AphrontMySQLDatabaseConnectionBase
         if (!$retries) {
           throw $ex;
         }
-
-        $class = get_class($ex);
-        $message = $ex->getMessage();
-        phlog("Retrying ({$retries}) after {$class}: {$message}");
       }
     }
   }