misc: move station and audio_streams to context_processors (in order to have them available in accounts views)

aircox/tests/views/test_base.py

@@ -54,13 +54,11 @@ class TestBaseView:
         context = base_view.get_context_data()
         assert context == {
             "view": base_view,
-            "station": station,
             "page": None,  # get_page() returns None
             "has_sidebar": base_view.has_sidebar,
             "has_filters": False,
             "sidebar_object_list": published_pages[: base_view.list_count],
             "sidebar_list_url": base_view.get_sidebar_url(),
-            "audio_streams": station.streams,
             "model": base_view.model,
         }