remove get_statistics_for_service_for_day from codebase

two down, three to go

app/notify_client/statistics_api_client.py

@@ -22,16 +22,6 @@ class StatisticsApiClient(BaseAPIClient):
             params=params
         )
 
-    def get_statistics_for_service_for_day(self, service_id, day):
-        url = '/service/{}/notifications-statistics/day/{}'.format(service_id, day)
-        try:
-            return self.get(url=url)['data']
-        except HTTPError as e:
-            if e.status_code == 404:
-                return None
-            else:
-                raise e
-
     def get_7_day_aggregate_for_service(self, service_id, date_from=None, week_count=None):
         params = {}
         if date_from is not None: