Clean up remaining Flight.from_cp users.

The preferred API for this has been `Flight.departure` for a while.

game/ato/flight.py

@@ -149,10 +149,6 @@ class Flight(SidcDescribable):
     def is_helo(self) -> bool:
         return self.unit_type.dcs_unit_type.helicopter
 
-    @property
-    def from_cp(self) -> ControlPoint:
-        return self.departure
-
     @property
     def points(self) -> List[FlightWaypoint]:
         return self.flight_plan.waypoints[1:]

game/ato/flightplans/flightplan.py

@@ -283,7 +283,7 @@ class FlightPlan(ABC, Generic[LayoutT]):
     def estimate_ground_ops(self) -> timedelta:
         if self.flight.start_type in {StartType.RUNWAY, StartType.IN_FLIGHT}:
             return timedelta()
-        if self.flight.from_cp.is_fleet:
+        if self.flight.departure.is_fleet:
             return timedelta(minutes=2)
         else:
             return timedelta(minutes=8)

game/missiongenerator/aircraft/flightgroupconfigurator.py

@@ -110,7 +110,7 @@ class FlightGroupConfigurator:
             flight_type=self.flight.flight_type,
             units=self.group.units,
             size=len(self.group.units),
-            friendly=self.flight.from_cp.captured,
+            friendly=self.flight.departure.captured,
             departure_delay=mission_start_time,
             departure=self.flight.departure.active_runway(
                 self.game.theater, self.game.conditions, self.dynamic_runways

game/missiongenerator/aircraft/waypoints/waypointgenerator.py

@@ -286,7 +286,7 @@ class WaypointGenerator:
             # hot aircraft hours before their takeoff time.
             return True
 
-        if self.flight.from_cp.is_fleet:
+        if self.flight.departure.is_fleet:
             # Carrier spawns will crowd the carrier deck, especially without
             # super carrier.
             # TODO: Is there enough parking on the supercarrier?