Revert "tty: pty: Fix race condition between release_one_tty and pty_write"

This reverts commit b9ca5f85 as 0-day
shows it has a circular locking dependency.

Fixes: b9ca5f85

 ("tty: pty: Fix race condition between release_one_tty and pty_write")
Reported-by: kernel test robot <lkp@intel.com>
Cc: Sahara <keun-o.park@darkmatter.ae>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>