AtlasGeoModel: Remove useless message.

Remove useless recently-added muon geometry message.

DetectorDescription/GeoModel/AtlasGeoModel/python/MuonGM.py

-# Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+# Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
 
 from AthenaCommon.JobProperties import jobproperties
 from AthenaCommon.DetFlags      import DetFlags
@@ -21,7 +21,7 @@ elif ( DetFlags.detdescr.Muon_on() ):
     GeoModelSvc.DetectorTools[ "MuonDetectorTool" ].BuildFromNova = 0
     if ( ( not DetFlags.simulate.any_on() or DetFlags.overlay.any_on() ) and "AthSimulation_DIR" not in os.environ ):
 #      GeoModelSvc.DetectorTools[ "MuonDetectorTool" ].TheMuonAlignmentTool = "MuonAlignmentDbTool/MGM_AlignmentDbTool"
-        print " MuonAlignmentDbTool is not supported anymore"
+        pass
     else:
       GeoModelSvc.DetectorTools[ "MuonDetectorTool" ].UseConditionDb = 0
       GeoModelSvc.DetectorTools[ "MuonDetectorTool" ].UseAsciiConditionData = 0