Revert "ANDROID: vendor_hooks: add waiting information for blocked tasks"

This reverts portions of commit 9ad8ff90

The mutex code is rewritten in 5.15-rc1, so hooks like this are no
longer in the correct location, if even needed at all.  So remove them
for now, if vendors still need them, they can add them back in.

Signed-off-by: Sangmoon Kim <sangmoon.kim@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ib85c108e5bb306faea4fef5e0ca3b617a7f8f5c6