Remove useless TravelTime class.

This is only called for real in one spot. The other callers should have
been deferring to the one real caller.

game/ato/flightplans/flightplan.py

@@ -20,7 +20,7 @@ from game.utils import Distance, Speed, meters
 from .planningerror import PlanningError
 from ..flightwaypointtype import FlightWaypointType
 from ..starttype import StartType
-from ..traveltime import GroundSpeed, TravelTime
+from ..traveltime import GroundSpeed
 
 if TYPE_CHECKING:
     from game.dcs.aircrafttype import FuelConsumption
@@ -228,9 +228,10 @@ class FlightPlan(ABC, Generic[LayoutT]):
     def travel_time_between_waypoints(
         self, a: FlightWaypoint, b: FlightWaypoint
     ) -> timedelta:
-        return TravelTime.between_points(
-            a.position, b.position, self.speed_between_waypoints(a, b)
-        )
+        error_factor = 1.05
+        speed = self.speed_between_waypoints(a, b)
+        distance = meters(a.position.distance_to_point(b.position))
+        return timedelta(hours=distance.nautical_miles / speed.knots * error_factor)
 
     def tot_for_waypoint(self, waypoint: FlightWaypoint) -> datetime | None:
         raise NotImplementedError

game/ato/flightplans/formation.py

@@ -10,7 +10,6 @@ from game.typeguard import self_type_guard
 from game.utils import Speed
 from .flightplan import FlightPlan
 from .loiter import LoiterFlightPlan, LoiterLayout
-from ..traveltime import GroundSpeed, TravelTime
 
 if TYPE_CHECKING:
     from ..flightwaypoint import FlightWaypoint
@@ -93,10 +92,8 @@ class FormationFlightPlan(LoiterFlightPlan[LayoutT], ABC):
 
     @property
     def push_time(self) -> datetime:
-        return self.join_time - TravelTime.between_points(
-            self.layout.hold.position,
-            self.layout.join.position,
-            GroundSpeed.for_flight(self.flight, self.layout.hold.alt),
+        return self.join_time - self.travel_time_between_waypoints(
+            self.layout.hold, self.layout.join
         )
 
     @property

game/ato/flightplans/sweep.py

@@ -10,7 +10,6 @@ from game.utils import Heading
 from .ibuilder import IBuilder
 from .loiter import LoiterFlightPlan, LoiterLayout
 from .waypointbuilder import WaypointBuilder
-from ..traveltime import GroundSpeed, TravelTime
 from ...flightplan import HoldZoneGeometry
 
 if TYPE_CHECKING:
@@ -78,10 +77,8 @@ class SweepFlightPlan(LoiterFlightPlan[SweepLayout]):
 
     @property
     def push_time(self) -> datetime:
-        return self.sweep_end_time - TravelTime.between_points(
-            self.layout.hold.position,
-            self.layout.sweep_end.position,
-            GroundSpeed.for_flight(self.flight, self.layout.hold.alt),
+        return self.sweep_end_time - self.travel_time_between_waypoints(
+            self.layout.hold, self.layout.sweep_end
         )
 
     @property

game/ato/traveltime.py

@@ -1,17 +1,9 @@
 from __future__ import annotations
 
-from datetime import datetime, timedelta
+from datetime import datetime
 from typing import TYPE_CHECKING
 
-from dcs.mapping import Point
-
-from game.utils import (
-    Distance,
-    SPEED_OF_SOUND_AT_SEA_LEVEL,
-    Speed,
-    mach,
-    meters,
-)
+from game.utils import Distance, SPEED_OF_SOUND_AT_SEA_LEVEL, Speed, mach
 
 if TYPE_CHECKING:
     from .flight import Flight
@@ -42,14 +34,6 @@ class GroundSpeed:
         return mach(cruise_mach, altitude)
 
 
-class TravelTime:
-    @staticmethod
-    def between_points(a: Point, b: Point, speed: Speed) -> timedelta:
-        error_factor = 1.05
-        distance = meters(a.distance_to_point(b))
-        return timedelta(hours=distance.nautical_miles / speed.knots * error_factor)
-
-
 # TODO: Most if not all of this should move into FlightPlan.
 class TotEstimator:
     def __init__(self, package: Package) -> None: