message: [sql lab - explore flow] make sure groupby is empty
diff: @@ -111,18 +111,15 @@ class ExploreResultsButton extends React.PureComponent {
  .done((resp) => {
  const columns = this.getColumns();
  const data = JSON.parse(resp);
  - const mainGroupBy = columns.filter(d => d.is_dim)[0];
  const formData = {
  datasource: `${data.table_id}__table`,
  metrics: [],
  + groupby: [],
  viz_type: 'table',
  since: '100 years ago',
  all_columns: columns.map(c => c.name),
  row_limit: 1000,
  };
  - if (mainGroupBy) {
  - formData.groupby = [mainGroupBy.name];
  - }
  this.props.actions.addInfoToast(t('Creating a data source and creating a new tab'));
  // open new window for data visualization
  