Remove unsed stdev function

src/acquisition/covidcast/database.py

@@ -231,36 +231,6 @@ def insert_or_update_batch(self, cc_rows, batch_size=2**20, commit_partial=False
       self._cursor.execute(drop_tmp_table_sql)
     return total
 
-  def get_data_stdev_across_locations(self, max_day):
-    """
-    Return the standard deviation of daily data over all locations, for all
-    (source, signal, geo_type) tuples.
-
-    `max_day`: base the standard deviation on data up to, and including, but
-      not after, this day (e.g. for a stable result over time)
-    """
-
-    sql = '''
-      SELECT
-        `source`,
-        `signal`,
-        `geo_type`,
-        COALESCE(STD(`value`), 0) AS `aggregate_stdev`
-      FROM
-        `covidcast`
-      WHERE
-        `time_type` = 'day' AND
-        `time_value` <= %s
-      GROUP BY
-        `source`,
-        `signal`,
-        `geo_type`
-    '''
-
-    args = (max_day,)
-    self._cursor.execute(sql, args)
-    return list(self._cursor)
-
   def get_covidcast_meta(self):
     """Compute and return metadata on all non-WIP COVIDcast signals."""
 

tests/acquisition/covidcast/test_database.py

@@ -73,32 +73,6 @@ def test_count_all_rows_query(self):
     self.assertIn('select count(1)', sql)
     self.assertIn('from `covidcast`', sql)
 
-  def test_get_data_stdev_across_locations_query(self):
-    """Query to get signal-level standard deviation looks sensible.
-
-    NOTE: Actual behavior is tested by integration test.
-    """
-
-    args = ('max_day',)
-    mock_connector = MagicMock()
-    database = Database()
-    database.connect(connector_impl=mock_connector)
-
-    database.get_data_stdev_across_locations(*args)
-
-    connection = mock_connector.connect()
-    cursor = connection.cursor()
-    self.assertTrue(cursor.execute.called)
-
-    sql, args = cursor.execute.call_args[0]
-    expected_args = ('max_day',)
-    self.assertEqual(args, expected_args)
-
-    sql = sql.lower()
-    self.assertIn('select', sql)
-    self.assertIn('`covidcast`', sql)
-    self.assertIn('std(', sql)
-
   def test_update_covidcast_meta_cache_query(self):
     """Query to update the metadata cache looks sensible.