[Intel-gfx] [PATCH igt] igt/tools_test: Remove dmesg subtest

[Chris Wilson]

Quoting Chris Wilson (2017-09-07 19:29:25)
> It's a silly test. If fails if there is an *ERROR* in the dmesg ringbuf,
> so it neither is testing that errors are generated as expected, and as a
> pre-check it can only see what's at the end of the dmesg and may miss
> earlier faults. As a test it just randomly fails; worse than useless.
> 
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102369
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris