message: Remove metrics control non-null validator in Table context
diff: @@ -242,7 +242,8 @@ const visTypes = {
  label: 'NOT GROUPED BY',
  description: 'Use this section if you want to query atomic rows',
  controlSetRows: [
  - ['all_columns', 'order_by_cols'],
  + ['all_columns'],
  + ['order_by_cols'],
  ],
  },
  {
  @@ -255,6 +256,9 @@ const visTypes = {
  },
  ],
  controlOverrides: {
  + metrics: {
  + validators: [],
  + },
  time_grain_sqla: {
  default: null,
  },
  