Don't cull flights.

This was made largely pointless in 2.2, since the AI won't plan a dozen
CAPs 300nm from the front line any more. Culling flights mostly just
confuses players and breaks the planning AI.

If we do want to limit flight counts, we need to do that by limiting
flight counts. The AI will try to put their aircraft as close to the
mission as possible, so culling will do very little to stop them from
spawning 50 flights at the front-line attached airfield.

https://github.com/Khopa/dcs_liberation/issues/578

gen/aircraft.py

@@ -925,10 +925,6 @@ class AircraftConflictGenerator:
             if not package.flights:
                 continue
             for flight in package.flights:
-                culled = self.game.position_culled(flight.from_cp.position)
-                if flight.client_count == 0 and culled:
-                    logging.info("Flight not generated: culled")
-                    continue
                 logging.info(f"Generating flight: {flight.unit_type}")
                 group = self.generate_planned_flight(flight.from_cp, country,
                                                      flight)