Fix Flight Deck glareshield description for ATC MSG

Author: frankkopp

docs/pilots-corner/a32nx-briefing/flight-deck/glareshield/warning.md

@@ -71,9 +71,6 @@ The aural warnings terminate when:
 
 - Will flash when an ATC message is received via the CPDLC (Controller-Pilot Data Link Communication), accompanied by an alarm. This notification can be cancelled by pressing the "ATC MSG" pb.
 
-!!! attention ""
-    Currently not available or INOP in the FBW A32NX for Microsoft Flight Simulator.
-
 ---
 
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