QtIFW

remove unneeded method in the uninstall case

 - an uninstallation is basically running the undo operation on all
   ran/saved operations, for this no scripts are needed and usually
   they are not loaded to run the uninstaller(maybe there is a bug if
   the user used the previous button of the maintenance tool in the
   packagemanager or updater mode)
 - both removed methods using things from script which shouldn't load
   in the uninstall only mode
 - what should do an uninstaller if they need to close an application
   to run correctly, till now this is not needed because if the delete
   method of the installer can't remove a file it moves it to the temp
   directory


Change-Id: Ia8d8337b64450473fd400a4c5b2fc2d96daefecc
Reviewed-by: Karsten Heimrich <karsten.heimrich@nokia.com>