tests/kms_available_modes_crc: remove test

Remove kms_available_modes_crc test as this test is meaningless
these days. This test was created back in the day when igt supported
only 24bpp rgb format hence there was need to test packed yuv
and nv12 did work. Now this test is duplicated by kms_plane
pixel format tests among others.

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Acked-by: Petri Latvala <petri.latvala@intel.com>