Revert "NFSD: Fix possible sleep during nfsd4_release_lockowner()"

This reverts commit ef481b26 which is
commit ce3c4ad7f4ce5db7b4f08a1e237d8dd94b39180b upstream.

The maintainers ask it to be removed in this branch.

Cc: Dai Ngo <dai.ngo@oracle.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/linux-nfs/3162C5BC-8E7C-4A9A-815C-09297B56FA17@oracle.com/T/#t


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>