Emoji API should not need auth

Fixes #204

api/views/emoji.py

@@ -1,10 +1,8 @@
 from activities.models import Emoji
-from api.decorators import identity_required
 from api.schemas import CustomEmoji
 from api.views.base import api_router
 
 
 @api_router.get("/v1/custom_emojis", response=list[CustomEmoji])
-@identity_required
 def emojis(request):
     return [e.to_mastodon_json() for e in Emoji.objects.usable()]