fs: dlm: remove unnecessary waker_up() calls

The wake_up() is already handled inside of midcomms_node_reset() when
switching the state to CLOSED state. So there is not need to call it
after midcomms_node_reset() again.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>