Provider seems to have redundant logic, cloned from the requirer

[sed-i]

• _stored gets overwritten every loop iteration.
• Why the provider needs to extract this from relation data? Seems like this was cloned from the requirer. Not sure.

traefik-route-k8s-operator/lib/charms/traefik_route_k8s/v0/traefik_route.py

Lines 206 to 214 in d25e148

	for relation in self._charm.model.relations[self._relation_name]:
	if not relation.app:
	self._stored.external_host = ""
	self._stored.scheme = ""
	return
	external_host = relation.data[relation.app].get("external_host", "")
	self._stored.external_host = external_host or self._stored.external_host
	scheme = relation.data[relation.app].get("scheme", "")
	self._stored.scheme = scheme or self._stored.scheme

Originally posted in canonical/traefik-k8s-operator#234 (comment)