drm/xe/kunit: Drop xe_wa tests for pre-production DG2

As workarounds for pre-production DG2 were dropped in
commit 707d1b992cfe ("drm/xe/dg2: Drop pre-production workarounds"),
there's no point running the kunit tests for them. Drop
those steppings from kunit.

Cc: Gustavo Sousa <gustavo.sousa@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231221163213.3849523-1-lucas.demarchi@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/tests/xe_wa_test.c

@@ -66,14 +66,8 @@ static const struct platform_test_case cases[] = {
 	PLATFORM_CASE(ALDERLAKE_P, C0),
 	SUBPLATFORM_CASE(ALDERLAKE_S, RPLS, D0),
 	SUBPLATFORM_CASE(ALDERLAKE_P, RPLU, E0),
-	SUBPLATFORM_CASE(DG2, G10, A0),
-	SUBPLATFORM_CASE(DG2, G10, A1),
-	SUBPLATFORM_CASE(DG2, G10, B0),
 	SUBPLATFORM_CASE(DG2, G10, C0),
-	SUBPLATFORM_CASE(DG2, G11, A0),
-	SUBPLATFORM_CASE(DG2, G11, B0),
 	SUBPLATFORM_CASE(DG2, G11, B1),
-	SUBPLATFORM_CASE(DG2, G12, A0),
 	SUBPLATFORM_CASE(DG2, G12, A1),
 	PLATFORM_CASE(PVC, B0),
 	PLATFORM_CASE(PVC, B1),