Revert merge from inverse

https://github.com/Zentyal/sogo/pull/150

Because the login on web with the use of outlook is broken after
including the DomainLessLogin feature

SoObjects/SOGo/NSString+Utilities.h

@@ -1,6 +1,6 @@
 /* NSString+Utilities.h - this file is part of SOGo
  *
- * Copyright (C) 2006-2015 Inverse inc.
+ * Copyright (C) 2006-2014 Inverse inc.
  *
  * This file is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -46,9 +46,6 @@
 - (NSString *) asCSSIdentifier;
 - (NSString *) fromCSSIdentifier;
 
-/* JavaScript safety */
-- (NSString *) asSafeJSString;
-
 /* SQL safety */
 - (NSString *) asSafeSQLString;