refactor: replace Trio with asyncio/uvloop

lnbits/core/__init__.py

@@ -6,14 +6,8 @@ db = Database("database")
 
 core_app: APIRouter = APIRouter()
 
-from lnbits.tasks import record_async
-
-from .tasks import register_listeners
 from .views.api import *  # noqa
 from .views.generic import *  # noqa
 from .views.public_api import *  # noqa
 
 
-@core_app.on_event("startup")
-def do_startup():
-     record_async(register_listeners)