refs #452, removed some classes which will be replaced by new classes

* CAircraftMappings -> will be replace by CAircraftModel
* CAircraftIcaoData aircraft ICAO data -> aircraft/airline ICAO code and livery
* CAircraft class no longer to be used, but CSimulatedAircraft
* removed corresponding GUI model classes / filters

src/blackmisc/blackmiscfreefunctions_nwmeta.cpp

@@ -27,6 +27,4 @@ void BlackMisc::Network::registerMetadata()
     CClient::registerMetadata();
     CClientList::registerMetadata();
     CVoiceCapabilities::registerMetadata();
-    CAircraftMapping::registerMetadata();
-    CAircraftMappingList::registerMetadata();
 }