Fix mypy issues.

gen/aircraft.py

@@ -668,7 +668,8 @@ class AircraftConflictGenerator:
             units=group.units,
             size=len(group.units),
             friendly=flight.from_cp.captured,
-            departure_delay=flight.scheduled_in,
+            # Set later.
+            departure_delay=timedelta(),
             departure=departure_runway,
             arrival=departure_runway,
             # TODO: Support for divert airfields.

gen/flights/flight.py

@@ -139,11 +139,6 @@ class Flight:
         self.targets: List[MissionTarget] = []
         self.loadout: Dict[str, str] = {}
         self.start_type = start_type
-        # Late activation delay in seconds from mission start. This is not
-        # the same as the flight's takeoff time. Takeoff time depends on the
-        # mission's TOT and the other flights in the package. Takeoff time is
-        # determined by AirConflictGenerator.
-        self.scheduled_in = 0
         self.use_custom_loadout = False
         self.client_count = 0
 

qt_ui/windows/mission/flight/QFlightCreator.py

@@ -108,7 +108,6 @@ class QFlightCreator(QDialog):
         else:
             start_type = "Warm"
         flight = Flight(self.package, aircraft, size, origin, task, start_type)
-        flight.scheduled_in = self.package.delay
         flight.client_count = self.client_slots_spinner.value()
 
         # noinspection PyUnresolvedReferences