remove unused class forward

Change-Id: I51d19bb2dac3ffe84f905bf187d361c04694f72d
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>
prepare script engine to get the gui object later

  - Since we need two different script engines we need to be able to set
    the gui object later

Change-Id: Ie40f8ec3dd84dc4d5b3cf127c3e41ce25ef53b66
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>