(fix) added doc to sogo-tool manage-eas + did cleanups (fixes #3967)

Tools/SOGoToolUserPreferences.m

@@ -1,8 +1,6 @@
 /* SOGoToolUserPreferences.m - this file is part of SOGo
  *
- * Copyright (C) 2011-2013 Inverse inc.
- *
- * Author: Ludovic Marcotte  <lmarcotte@inverse.ca>
+ * Copyright (C) 2011-2017 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
@@ -50,10 +48,6 @@ typedef enum
 
 @implementation SOGoToolUserPreferences
 
-+ (void) initialize
-{
-}
-
 + (NSString *) command
 {
   return @"user-preferences";