CI: remove corstone1000 job configs temporarily

Remove references to corstone1000 job configs as they
have been temporarily removed from the available scripts
due to a known issue being investigated by CS1000 team.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: Ic6c84f0c05d9fc0efb09d0012753e53e3ae1e822
5 files changed