Remove incorrect localVue usage

localVue is required only with use method

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

 import _ from 'underscore';
-import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import { GlButton, GlLoadingIcon } from '@gitlab/ui';
 import ApprovalsList from 'ee/vue_merge_request_widget/components/approvals/approvals_list.vue';
 import ApprovalsFooter from 'ee/vue_merge_request_widget/components/approvals/approvals_footer.vue';
 import Icon from '~/vue_shared/components/icon.vue';
 import UserAvatarList from '~/vue_shared/components/user_avatar/user_avatar_list.vue';
 
-const localVue = createLocalVue();
-
 const testSuggestedApprovers = () => _.range(1, 11).map(id => ({ id }));
 const testApprovalRules = () => [{ name: 'Lorem' }, { name: 'Ipsum' }];
 
@@ -15,13 +13,12 @@ describe('EE MRWidget approvals footer', () => {
   let wrapper;
 
   const createComponent = (props = {}) => {
-    wrapper = shallowMount(localVue.extend(ApprovalsFooter), {
+    wrapper = shallowMount(ApprovalsFooter, {
       propsData: {
         suggestedApprovers: testSuggestedApprovers(),
         approvalRules: testApprovalRules(),
         ...props,
       },
-      localVue,
       sync: false,
     });
   };
@@ -190,8 +187,8 @@ describe('EE MRWidget approvals footer', () => {
 
         button.vm.$emit('click');
 
-        localVue
-          .nextTick()
+        wrapper.vm
+          .$nextTick()
           .then(() => {
             expect(wrapper.emittedByOrder()).toEqual([{ name: 'input', args: [true] }]);
           })

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

-import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import _ from 'underscore';
 import ApprovedIcon from 'ee/vue_merge_request_widget/components/approvals/approved_icon.vue';
 import ApprovalsList from 'ee/vue_merge_request_widget/components/approvals/approvals_list.vue';
 import UserAvatarList from '~/vue_shared/components/user_avatar/user_avatar_list.vue';
 
-const localVue = createLocalVue();
-
 const testApprovers = () => _.range(1, 11).map(id => ({ id }));
 const testRuleApproved = () => ({
   id: 1,
@@ -57,9 +55,8 @@ describe('EE MRWidget approvals list', () => {
   let wrapper;
 
   const createComponent = (props = {}) => {
-    wrapper = shallowMount(localVue.extend(ApprovalsList), {
+    wrapper = shallowMount(ApprovalsList, {
       propsData: props,
-      localVue,
       sync: false,
     });
   };

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

-import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import { GlLink } from '@gitlab/ui';
 import {
   OPTIONAL,
@@ -6,18 +6,15 @@ import {
 } from 'ee/vue_merge_request_widget/components/approvals/messages';
 import ApprovalsSummaryOptional from 'ee/vue_merge_request_widget/components/approvals/approvals_summary_optional.vue';
 
-const localVue = createLocalVue();
-
 const TEST_HELP_PATH = 'help/path';
 
 describe('EE MRWidget approvals summary optional', () => {
   let wrapper;
 
   const createComponent = (props = {}) => {
-    wrapper = shallowMount(localVue.extend(ApprovalsSummaryOptional), {
+    wrapper = shallowMount(ApprovalsSummaryOptional, {
       propsData: props,
       sync: false,
-      localVue,
       attachToDocument: true,
     });
   };

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

-import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import _ from 'underscore';
 import { APPROVED_MESSAGE } from 'ee/vue_merge_request_widget/components/approvals/messages';
 import ApprovalsSummary from 'ee/vue_merge_request_widget/components/approvals/approvals_summary.vue';
 import { toNounSeriesText } from '~/lib/utils/grammar';
 import UserAvatarList from '~/vue_shared/components/user_avatar/user_avatar_list.vue';
 
-const localVue = createLocalVue();
-
 const testApprovers = () => _.range(1, 5).map(id => ({ id }));
 const testRulesLeft = () => ['Lorem', 'Ipsum', 'dolar sit'];
 const TEST_APPROVALS_LEFT = 3;
@@ -15,7 +13,7 @@ describe('EE MRWidget approvals summary', () => {
   let wrapper;
 
   const createComponent = (props = {}) => {
-    wrapper = shallowMount(localVue.extend(ApprovalsSummary), {
+    wrapper = shallowMount(ApprovalsSummary, {
       propsData: {
         approved: false,
         approvers: testApprovers(),
@@ -23,7 +21,6 @@ describe('EE MRWidget approvals summary', () => {
         rulesLeft: testRulesLeft(),
         ...props,
       },
-      localVue,
       sync: false,
     });
   };

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

-import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import ApprovedIcon from 'ee/vue_merge_request_widget/components/approvals/approved_icon.vue';
 import Icon from '~/vue_shared/components/icon.vue';
 
-const localVue = createLocalVue();
 const EXPECTED_SIZE = 16;
 
 describe('EE MRWidget approved icon', () => {
   let wrapper;
 
   const createComponent = (props = {}) => {
-    wrapper = shallowMount(localVue.extend(ApprovedIcon), {
+    wrapper = shallowMount(ApprovedIcon, {
       propsData: props,
-      localVue,
       sync: false,
     });
   };

ee/spec/frontend/vue_mr_widget/components/blocking_merge_requests/blocking_merge_requests_report_spec.js

-import { createLocalVue, shallowMount, config } from '@vue/test-utils';
+import { shallowMount, config } from '@vue/test-utils';
 import BlockingMergeRequestsReport from 'ee/vue_merge_request_widget/components/blocking_merge_requests/blocking_merge_requests_report.vue';
 import ReportSection from '~/reports/components/report_section.vue';
 import { status as reportStatus } from '~/reports/constants';
 
-const localVue = createLocalVue();
-
 describe('BlockingMergeRequestsReport', () => {
   let wrapper;
   let props;
@@ -42,7 +40,6 @@ describe('BlockingMergeRequestsReport', () => {
   const createComponent = (propsData = props) => {
     wrapper = shallowMount(BlockingMergeRequestsReport, {
       propsData,
-      localVue,
     });
   };
 

ee/spec/frontend/vue_mr_widget/components/merge_train_helper_text_spec.js

-import { shallowMount, createLocalVue } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import { GlLink } from '@gitlab/ui';
 import { trimText } from 'helpers/text_helper';
 import MergeTrainHelperText from 'ee/vue_merge_request_widget/components/merge_train_helper_text.vue';
 
 describe('MergeTrainHelperText', () => {
-  const localVue = createLocalVue();
   let wrapper;
 
   const factory = propsData => {
-    wrapper = shallowMount(localVue.extend(MergeTrainHelperText), {
+    wrapper = shallowMount(MergeTrainHelperText, {
       propsData,
-      localVue,
       sync: false,
     });
   };

ee/spec/frontend/vue_mr_widget/components/merge_train_position_indicator_spec.js

-import { shallowMount, createLocalVue } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import { trimText } from 'helpers/text_helper';
 import MergeTrainPositionIndicator from 'ee/vue_merge_request_widget/components/merge_train_position_indicator.vue';
 
 describe('MergeTrainPositionIndicator', () => {
-  const localVue = createLocalVue();
   let wrapper;
   let vm;
 
   const factory = propsData => {
-    wrapper = shallowMount(localVue.extend(MergeTrainPositionIndicator), {
+    wrapper = shallowMount(MergeTrainPositionIndicator, {
       propsData,
-      localVue,
       sync: false,
     });
 

ee/spec/frontend/vue_mr_widget/components/states/mr_widget_ready_to_merge_spec.js

@@ -43,7 +43,7 @@ describe('ReadyToMerge', () => {
   };
 
   const factory = (mrUpdates = {}) => {
-    wrapper = shallowMount(localVue.extend(ReadyToMerge), {
+    wrapper = shallowMount(ReadyToMerge, {
       propsData: {
         mr: { ...mr, ...mrUpdates },
         service,

ee/spec/frontend/vue_mr_widget/components/visual_review_app_spec.js

-import { shallowMount, mount, createLocalVue } from '@vue/test-utils';
+import { shallowMount, mount } from '@vue/test-utils';
 import VisualReviewAppLink from 'ee/vue_merge_request_widget/components/visual_review_app_link.vue';
 import { GlButton, GlModal } from '@gitlab/ui';
 import { mockTracking, triggerEvent } from 'helpers/tracking_helper';
 import ModalCopyButton from '~/vue_shared/components/modal_copy_button.vue';
 
-const localVue = createLocalVue();
-
 describe('Visual Review App Link', () => {
-  const Component = localVue.extend(VisualReviewAppLink);
   let wrapper;
   let propsData;
 
@@ -30,9 +27,8 @@ describe('Visual Review App Link', () => {
 
   describe('renders link and text', () => {
     beforeEach(() => {
-      wrapper = mount(Component, {
+      wrapper = mount(VisualReviewAppLink, {
         propsData,
-        localVue,
       });
     });
 
@@ -49,9 +45,8 @@ describe('Visual Review App Link', () => {
 
   describe('renders the modal', () => {
     beforeEach(() => {
-      wrapper = shallowMount(Component, {
+      wrapper = shallowMount(VisualReviewAppLink, {
         propsData,
-        localVue,
       });
     });
     it('with expected project Id', () => {