message: Leave metrics empty if not specified
diff: @@ -269,7 +269,7 @@ class BaseViz(object):
  """Building a query object"""
  form_data = self.form_data
  groupby = form_data.get("groupby") or []
  - metrics = form_data.get("metrics") or ['count']
  + metrics = form_data.get("metrics") or []
  extra_filters = self.get_extra_filters()
  granularity = (
  form_data.get("granularity") or form_data.get("granularity_sqla")
  