Use new first-class MySQL timeout support in Phabricator

Summary: Fixes T6710. After D15669, we support a proper timeout parameter, so we don't need this hack anymore.

Test Plan: See D15669: forced a MySQL connector, set a low timeout, set a bad database, saw fast failures.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T6710

Differential Revision: https://secure.phabricator.com/D15670

src/infrastructure/cluster/PhabricatorDatabaseRef.php

@@ -358,10 +358,6 @@ final class PhabricatorDatabaseRef
       'timeout' => 15,
     );
 
-    // TODO: Remove this once the MySQL connector has proper support
-    // for it, see T6710.
-    ini_set('mysql.connect_timeout', $spec['timeout']);
-
     return PhabricatorEnv::newObjectFromConfig(
       'mysql.implementation',
       array(