nm_*_fsm: Remove comment no longer applying

Since b7ef6884f91db7ffe7add51766abc311c9e7d05e, the state is updated
before triggering the signal S_NM_STATECHG, so the warning does no
longer hold true.

Change-Id: I7b7dd30b4fcdc92febca42e3e6a75e6f98e184ff
7 files changed