tests: Drop gem_bad_length as redundant

Most of the gem_bad_length code is compiled out because creating
a zero-length object is not allowed anymore by i915 and thus it is
not possible to execute it. The remaining part checks that creation of
a zero-length object does indeed fail, which is also checked by
gem_create/create-invalid-size.
The only difference between the 2 tests is that gem_bad_length checks
specifically for EINVAL while create-invalid-size only looks for
failure, so after adding the EINVAL check to create-invalid-size it is
safe to drop gem_bad_length.

v2 (Joonas):
- Clarify header line, split the patch, fix Meson build and add Cc:

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
3 files changed