message: fix: fix scenerio generation package
  After removing DroneScenarioGeneration, init file has to be updated as well
diff: @@ -9,10 +9,8 @@ from .configurable_scenario_generation import add_config_reader_module
  __all__ = ["DeterministicScenarioGeneration",
  - "DroneChallengeScenarioGeneration",
  "LaneCorridorConfig",
  "ScenarioGeneration",
  "UniformVehicleDistribution",
  - "DeterministicDroneChallengeGeneration",
  "ConfigurableScenarioGeneration",
  "add_config_reader_module"]
  