lib/igt_gt: Remove static vcs2 engine

Keeping this entry with flags == -1 doesn't make sense. Batchbuffers
executed with such invalid flags will always return -EINVAL.

References: https://gitlab.freedesktop.org/drm/intel/-/issues/6393



In above reference entering iteration on static engines is the result
of fault in the driver (effect of previous fault-injection test).
As we know passing invalid flags is wrong lets get rid off this entry
from the static engine list.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>
Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>