remove abrt-dedup-client; related to #702

Signed-off-by: Michal Toman <mtoman@redhat.com>
Signed-off-by: Jakub Filak <jfilak@redhat.com>
spec: remove abrt-dedup-client; closes #702

Signed-off-by: Michal Toman <mtoman@redhat.com>
Signed-off-by: Jakub Filak <jfilak@redhat.com>