Remove un-needed factory

plugins/MobileMessaging/SMSProvider.php

@@ -39,25 +39,6 @@ abstract class SMSProvider extends BaseFactory
 			',
     );
 
-    /**
-     * Creates a new instance of a class using a string ID.
-     *
-     * @param string $classId The ID of the class.
-     * @return BaseFactory
-     * @throws Exception if $classId is invalid.
-     */
-    public static function factory($classId)
-    {
-        $className = static::getClassNameFromClassId($classId);
-
-        if(class_exists($className) &&
-            !is_subclass_of($className, __NAMESPACE__ . '\\SMSProvider')) {
-            throw new Exception("SMS Provider $classId must inherit SMSProvider class.");
-        }
-
-        return parent::factory($classId);
-    }
-
     protected static function getClassNameFromClassId($id)
     {
         return __NAMESPACE__ . '\\SMSProvider\\' . $id;