remove additional uses of Vue in global scope

app/assets/javascripts/boards/components/board_new_form.js

-/* global Vue */
 /* global BoardService */
+
+import Vue from 'vue';
+
 const boardMilestoneSelect = require('./milestone_select');
 const extraMilestones = require('../mixins/extra_milestones');
 

app/assets/javascripts/boards/components/boards_selector.js

-/* global Vue */
+import Vue from 'vue';
 
 require('./board_new_form');
 

app/assets/javascripts/boards/components/milestone_select.js

 /* global BoardService */
-/* global Vue */
+
 const extraMilestones = require('../mixins/extra_milestones');
 
 module.exports = {

app/assets/javascripts/commit/pipelines/pipelines_bundle.js

 /* eslint-disable no-param-reassign */
+
+import Vue from 'vue';
+import VueResource from 'vue-resource';
 import CommitPipelinesTable from './pipelines_table';
 
-window.Vue = require('vue');
-window.Vue.use(require('vue-resource'));
+Vue.use(VueResource);
 
 /**
  * Commits View > Pipelines Tab > Pipelines Table.

app/assets/javascripts/diff_notes/components/new_issue_for_discussion.js

-/* global Vue */
 /* global CommentsStore */
 
+import Vue from 'vue';
+
 (() => {
   const NewIssueForDiscussion = Vue.extend({
     props: {

app/assets/javascripts/merge_request_widget/approvals/approvals_api.js

 /* global Flash */
 
-window.Vue = require('vue');
-window.Vue.use(require('vue-resource'));
+import Vue from 'vue';
 
-const Vue = window.Vue;
 require('./approvals_store');
 
 class ApprovalsApi {

app/assets/javascripts/merge_request_widget/approvals/components/approvals_body.js

-/* global Vue */
+import Vue from 'vue';
 
-const Vue = require('vue');
 require('../approvals_store');
 require('../approvals_api');
 

app/assets/javascripts/merge_request_widget/approvals/components/approvals_footer.js

-/* global Vue */
+import Vue from 'vue';
 
-const Vue = require('vue');
 require('../approvals_store');
 require('../../../vue_common_component/link_to_member_avatar');
 

app/assets/javascripts/vue_common_component/link_to_member_avatar.js

-/* global Vue */
+import Vue from 'vue';
+
 // Analogue of link_to_member_avatar in app/helpers/projects_helper.rb
 
 (() => {

app/assets/javascripts/vue_pipelines_index/index.js

+import Vue from 'vue';
 import PipelinesStore from './stores/pipelines_store';
 import PipelinesComponent from './pipelines';
 import '../vue_shared/vue_resource_interceptor';
 
-const Vue = window.Vue = require('vue');
-window.Vue.use(require('vue-resource'));
-
 $(() => new Vue({
   el: document.querySelector('.vue-pipelines-index'),
 

spec/javascripts/approvals/approvals_body_spec.js

-/* global Vue */
+import Vue from 'vue';
 
 require('~/merge_request_widget/approvals/components/approvals_body');
 

spec/javascripts/approvals/approvals_footer_spec.js

-/* global Vue */
+import Vue from 'vue';
 
 require('~/merge_request_widget/approvals/components/approvals_footer');
 

spec/javascripts/boards/milestone_select_spec.js

-/* global Vue */
 /* global boardsMockInterceptor */
 /* global boardObj */
 /* global BoardService */
+
+import Vue from 'vue';
+
 const milestoneSelect = require('~/boards/components/milestone_select');
 require('~/boards/services/board_service');
 require('~/boards/stores/boards_store');

spec/javascripts/vue_common_components/link_to_member_avatar_spec.js

 /* eslint-disable guard-for-in, no-restricted-syntax */
-/* global Vue */
+
+import Vue from 'vue';
 
 require('~/vue_common_component/link_to_member_avatar');