Revert "hrtimer: Report offline hrtimer enqueue"

This reverts commit 15524057 which is
commit dad6a09f upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I3946038162ecfa5fafc8721ac4aaa8545ed540e2
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>