Revert "tracing: Wake up ring buffer waiters on closing of the file"

This reverts commit 2475de2b which is
commit f3ddb74a upstream.

It breaks the Android kernel ABI and is not needed for normal Android
systems so it is safe to remove.  If it is needed in the future, it can
be brought back in an abi-safe way.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I613585981534568a6ef0aa59d80f7b09db91e552