fix(charts): Time grain is None when dataset uses Jinja (#25842)

superset-frontend/plugins/plugin-chart-pivot-table/src/plugin/buildQuery.ts

@@ -16,8 +16,6 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-import omit from 'lodash/omit';
-
 import {
   AdhocColumn,
   buildQueryContext,
@@ -72,9 +70,7 @@ export default function buildQuery(formData: PivotTableQueryFormData) {
     }
     return [
       {
-        ...(hasGenericChartAxes
-          ? omit(baseQueryObject, ['extras.time_grain_sqla'])
-          : baseQueryObject),
+        ...baseQueryObject,
         orderby: orderBy,
         columns,
       },