Removed MSSQL mutex.

extensions/mutex/yii/mutex/MssqlMutex.php

-<?php
-/**
- * @link http://www.yiiframework.com/
- * @copyright Copyright (c) 2008 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-namespace yii\mutex;
-
-use Yii;
-use yii\base\InvalidConfigException;
-
-/**
- * @author resurtm <resurtm@gmail.com>
- * @since 2.0
- */
-class MssqlMutex extends Mutex
-{
-	/**
-	 * Initializes Microsoft SQL Server specific mutex component implementation.
-	 * @throws InvalidConfigException if [[db]] is not Microsoft SQL Server connection.
-	 */
-	public function init()
-	{
-		parent::init();
-		$driverName = $this->db->driverName;
-		if ($driverName !== 'sqlsrv' && $driverName !== 'dblib' && $driverName !== 'mssql') {
-			throw new InvalidConfigException('In order to use MssqlMutex connection must be configured to use MS SQL Server database.');
-		}
-	}
-
-	/**
-	 * This method should be extended by concrete mutex implementations. Acquires lock by given name.
-	 * @param string $name of the lock to be acquired.
-	 * @param integer $timeout to wait for lock to become released.
-	 * @return boolean acquiring result.
-	 * @throws \BadMethodCallException not implemented yet.
-	 * @see http://msdn.microsoft.com/en-us/library/ms189823.aspx
-	 */
-	protected function acquireLock($name, $timeout = 0)
-	{
-		throw new \BadMethodCallException('Not implemented yet.');
-	}
-
-	/**
-	 * This method should be extended by concrete mutex implementations. Releases lock by given name.
-	 * @param string $name of the lock to be released.
-	 * @return boolean release result.
-	 * @throws \BadMethodCallException not implemented yet.
-	 * @see http://msdn.microsoft.com/en-us/library/ms178602.aspx
-	 */
-	protected function releaseLock($name)
-	{
-		throw new \BadMethodCallException('Not implemented yet.');
-	}
-}