Remove incorrect localVue usage

localVue is required only with use method

spec/frontend/vue_shared/components/gl_modal_vuex_spec.js

@@ -33,7 +33,7 @@ describe('GlModalVuex', () => {
       ...options.propsData,
     };
 
-    wrapper = shallowMount(localVue.extend(GlModalVuex), {
+    wrapper = shallowMount(GlModalVuex, {
       ...options,
       localVue,
       store,
@@ -123,8 +123,8 @@ describe('GlModalVuex', () => {
 
     state.isVisible = true;
 
-    localVue
-      .nextTick()
+    wrapper.vm
+      .$nextTick()
       .then(() => {
         expect(rootEmit).toHaveBeenCalledWith('bv::show::modal', TEST_MODAL_ID);
       })
@@ -140,8 +140,8 @@ describe('GlModalVuex', () => {
 
     state.isVisible = false;
 
-    localVue
-      .nextTick()
+    wrapper.vm
+      .$nextTick()
       .then(() => {
         expect(rootEmit).toHaveBeenCalledWith('bv::hide::modal', TEST_MODAL_ID);
       })

spec/frontend/vue_shared/components/markdown/field_spec.js

-import { mount, createLocalVue } from '@vue/test-utils';
+import { mount } from '@vue/test-utils';
 import fieldComponent from '~/vue_shared/components/markdown/field.vue';
 import { TEST_HOST, FIXTURES_PATH } from 'spec/test_constants';
 import AxiosMockAdapter from 'axios-mock-adapter';
@@ -50,7 +50,6 @@ const getVideo = wrapper => wrapper.find('video');
 
 describe('Markdown field component', () => {
   let axiosMock;
-  const localVue = createLocalVue();
 
   beforeEach(() => {
     axiosMock = new AxiosMockAdapter(axios);
@@ -84,7 +83,7 @@ describe('Markdown field component', () => {
         previewLink = getPreviewLink(wrapper);
         previewLink.trigger('click');
 
-        return localVue.nextTick().then(() => {
+        return wrapper.vm.$nextTick().then(() => {
           expect(previewLink.element.parentNode.classList.contains('active')).toBeTruthy();
         });
       });
@@ -94,7 +93,7 @@ describe('Markdown field component', () => {
         previewLink = getPreviewLink(wrapper);
         previewLink.trigger('click');
 
-        localVue.nextTick(() => {
+        wrapper.vm.$nextTick(() => {
           expect(wrapper.find('.md-preview-holder').element.textContent.trim()).toContain(
             'Loading…',
           );
@@ -155,17 +154,17 @@ describe('Markdown field component', () => {
         previewLink = getPreviewLink(wrapper);
 
         writeLink.trigger('click');
-        return localVue
-          .nextTick()
+        return wrapper.vm
+          .$nextTick()
           .then(() => assertMarkdownTabs(true, writeLink, previewLink, wrapper))
           .then(() => writeLink.trigger('click'))
-          .then(() => localVue.nextTick())
+          .then(() => wrapper.vm.$nextTick())
           .then(() => assertMarkdownTabs(true, writeLink, previewLink, wrapper))
           .then(() => previewLink.trigger('click'))
-          .then(() => localVue.nextTick())
+          .then(() => wrapper.vm.$nextTick())
           .then(() => assertMarkdownTabs(false, writeLink, previewLink, wrapper))
           .then(() => previewLink.trigger('click'))
-          .then(() => localVue.nextTick())
+          .then(() => wrapper.vm.$nextTick())
           .then(() => assertMarkdownTabs(false, writeLink, previewLink, wrapper));
       });
     });
@@ -178,7 +177,7 @@ describe('Markdown field component', () => {
         const markdownButton = getMarkdownButton(wrapper);
         markdownButton.trigger('click');
 
-        localVue.nextTick(() => {
+        wrapper.vm.$nextTick(() => {
           expect(textarea.value).toContain('**testing**');
         });
       });
@@ -190,7 +189,7 @@ describe('Markdown field component', () => {
         const markdownButton = getAllMarkdownButtons(wrapper).wrappers[5];
         markdownButton.trigger('click');
 
-        localVue.nextTick(() => {
+        wrapper.vm.$nextTick(() => {
           expect(textarea.value).toContain('*  testing');
         });
       });
@@ -202,7 +201,7 @@ describe('Markdown field component', () => {
         const markdownButton = getAllMarkdownButtons(wrapper).wrappers[5];
         markdownButton.trigger('click');
 
-        localVue.nextTick(() => {
+        wrapper.vm.$nextTick(() => {
           expect(textarea.value).toContain('* testing\n* 123');
         });
       });

spec/frontend/vue_shared/components/markdown/suggestion_diff_row_spec.js

-import { shallowMount, createLocalVue } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import SuggestionDiffRow from '~/vue_shared/components/markdown/suggestion_diff_row.vue';
 
 const oldLine = {
@@ -27,10 +27,7 @@ describe('SuggestionDiffRow', () => {
   let wrapper;
 
   const factory = (options = {}) => {
-    const localVue = createLocalVue();
-
     wrapper = shallowMount(SuggestionDiffRow, {
-      localVue,
       ...options,
     });
   };

spec/frontend/vue_shared/components/user_avatar/user_avatar_list_spec.js

-import { shallowMount, createLocalVue } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import { GlButton } from '@gitlab/ui';
 import { TEST_HOST } from 'spec/test_constants';
 import UserAvatarList from '~/vue_shared/components/user_avatar/user_avatar_list.vue';
@@ -20,8 +20,6 @@ const createList = n =>
     .fill(1)
     .map((x, id) => createUser(id));
 
-const localVue = createLocalVue();
-
 describe('UserAvatarList', () => {
   let props;
   let wrapper;
@@ -32,9 +30,8 @@ describe('UserAvatarList', () => {
       ...options.propsData,
     };
 
-    wrapper = shallowMount(localVue.extend(UserAvatarList), {
+    wrapper = shallowMount(UserAvatarList, {
       ...options,
-      localVue,
       propsData,
     });
   };