Add "boards" context processor

This adds the "boards" context data to all pages, so they can render the
boards nav page.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/views.py

@@ -24,7 +24,6 @@ __all__ = (
     "BanSuccessView",
     "BannedView",
     "BoardView",
-    "HomeView",
     "NewsListView",
     "PostCreateView",
     "PostModifyView",
@@ -49,15 +48,6 @@ def can_modify(user):
     )
 
 
-class HomeView(TemplateView):
-    template_name = "board/home.html"
-
-    def get_context_data(self, **kwargs: Any) -> Dict[str, Any]:
-        context = super().get_context_data(**kwargs)
-        context["boards"] = Board.objects.filter(readonly=False)
-        return context
-
-
 class ActionSuccessView(TemplateView):
     template_name = "board/action_success.html"
     message = "Action completed."