Init birdseye restream command in S6 (#5494)

* remove restream from frigate logic

* Migrate birdseye stream definition to S6

* Cleanup

* Use consts to import as well

frigate/app.py

@@ -28,7 +28,6 @@ from frigate.object_processing import TrackedObjectProcessor
 from frigate.output import output_frames
 from frigate.plus import PlusApi
 from frigate.record import RecordingCleanup, RecordingMaintainer
-from frigate.restream import RestreamApi
 from frigate.stats import StatsEmitter, stats_init
 from frigate.storage import StorageMaintainer
 from frigate.version import VERSION
@@ -173,10 +172,6 @@ class FrigateApp:
             self.plus_api,
         )
 
-    def init_restream(self) -> None:
-        self.restream = RestreamApi(self.config)
-        self.restream.add_cameras()
-
     def init_dispatcher(self) -> None:
         comms: list[Communicator] = []
 
@@ -381,7 +376,6 @@ class FrigateApp:
             print(e)
             self.log_process.terminate()
             sys.exit(1)
-        self.init_restream()
         self.start_detectors()
         self.start_video_output_processor()
         self.start_detected_frames_processor()