doc: Remove create_sl.sh

sphinx does not require this.

Change-Id: I941bb9456f1de0748787738258539ec08ca630a5
Signed-off-by: Dima Kuznetsov <dkuznets@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/35916
Reviewed-by: Saggi Mizrahi <smizrahi@redhat.com>
Reviewed-by: Yeela Kaplan <ykaplan@redhat.com>
Reviewed-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-by: mooli tayer <mtayer@redhat.com>