[tsan][test] Remove some unneded debug comments in a tsan test (#86896)

I introduced this test in #86537, let's remove some unneeded debugging
comments.
This PR was initially also moving the test to linux directory but looks
like it's already done by 17ab9e64464f989b3fe4a304a450581a618097a0 .

GitOrigin-RevId: cc98ffb6dc6ca3e68fd939558eb8c4ddb1cc03de
1 file changed