Merge pull request #4472 from owncloud/remove-disconnect

Remove disconnect function from OC_DB

* owncloud/remove-disconnect:
  Remove disconnect function from OC_DB

lib/db.php

@@ -329,18 +329,6 @@ class OC_DB {
 		self::$connection->commit();
 	}
 
-	/**
-	 * @brief Disconnect
-	 *
-	 * This is good bye, good bye, yeah!
-	 */
-	public static function disconnect() {
-		// Cut connection if required
-		if(self::$connection) {
-			self::$connection->close();
-		}
-	}
-
 	/**
 	 * @brief saves database schema to xml file
 	 * @param string $file name of file