Show blank empty text for approved by in MR widget

Issue: https://gitlab.com/gitlab-org/gitlab/-/issues/233082

ee/app/assets/javascripts/vue_merge_request_widget/components/approvals/approvals_list.vue

@@ -164,7 +164,7 @@ export default {
           {{ pendingApprovalsText(rule) }}
         </td>
         <td class="d-none d-sm-table-cell js-approved-by">
-          <user-avatar-list :items="rule.approved_by" :img-size="24" />
+          <user-avatar-list :items="rule.approved_by" :img-size="24" empty-text="" />
         </td>
       </tr>
     </tbody>

ee/changelogs/unreleased/233082-remove-none-in-approved-by.yml

+---
+title: Show blank empty text for approved by in MR widget
+merge_request: 38436
+author:
+type: changed

ee/spec/frontend/vue_mr_widget/components/approvals/approvals_list_spec.js

@@ -160,6 +160,7 @@ describe('EE MRWidget approvals list', () => {
       expect(approvers.props()).toEqual(
         expect.objectContaining({
           items: rule.approved_by,
+          emptyText: '',
         }),
       );
     });