selftests/damon/config: remove configs for DAMON debugfs interface selftests

selftests/damon/config: remove configs for DAMON debugfs interface selftests

It's time to remove DAMON debugfs interface, which has deprecated long
before in February 2023.  Read the cover letter of this patch series for
more details.

Remove configs for selftests of it from DAMON selftests config file, to
prevent unnecessary noises from the tests.

[1] https://lore.kernel.org/20230209192009.7885-1-sj@kernel.org

Link: https://lkml.kernel.org/r/20250106191941.107070-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Alex Shi <alexs@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: Hu Haowen <2023002089@link.tyut.edu.cn>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Rae Moar <rmoar@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Yanteng Si <si.yanteng@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>