remove obsoleted abrt-screencast

The tool has been already replaced by fros.

Related to rhbz#958979

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Signed-off-by: Martin Milata <mmilata@redhat.com>
spec: remove abrt-screencast

Related to rhbz#958979

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Signed-off-by: Martin Milata <mmilata@redhat.com>