Removed the templates/monthly endpoint

Removed the REST endpoint and the DAO that it uses as the endpoint is
no longer used by the Admin UI and the DAO is not reused anywhere
else.

- Removed REST endpoint
- Removed DAO which gets the stats
- Removed associated tests of both methods

app/service/rest.py

@@ -37,7 +37,6 @@ from app.dao.services_dao import (
     dao_fetch_all_services,
     dao_fetch_all_services_by_user,
     dao_fetch_monthly_historical_stats_for_service,
-    dao_fetch_monthly_historical_stats_by_template_for_service,
     dao_fetch_monthly_historical_usage_by_template_for_service,
     dao_fetch_service_by_id,
     dao_fetch_stats_for_service,
@@ -541,18 +540,6 @@ def get_monthly_template_usage(service_id):
         raise InvalidRequest('Year must be a number', status_code=400)
 
 
-@service_blueprint.route('/<uuid:service_id>/notifications/templates/monthly', methods=['GET'])
-def get_monthly_template_stats(service_id):
-    service = dao_fetch_service_by_id(service_id)
-    try:
-        return jsonify(data=dao_fetch_monthly_historical_stats_by_template_for_service(
-            service.id,
-            int(request.args.get('year', 'NaN'))
-        ))
-    except ValueError:
-        raise InvalidRequest('Year must be a number', status_code=400)
-
-
 @service_blueprint.route('/<uuid:service_id>/inbound-api', methods=['POST'])
 def create_service_inbound_api(service_id):
     data = request.get_json()