remove all unused eslint-disable rules

app/assets/javascripts/activities.js

-/* eslint-disable no-param-reassign, class-methods-use-this */
+/* eslint-disable class-methods-use-this */
 import $ from 'jquery';
 import Cookies from 'js-cookie';

app/assets/javascripts/autosave.js

-/* eslint-disable no-param-reassign, prefer-template, no-var, no-void, consistent-return */
+/* eslint-disable no-param-reassign, prefer-template, no-void, consistent-return */
 import AccessorUtilities from './lib/utils/accessor';

app/assets/javascripts/behaviors/markdown/copy_as_gfm.js

-/* eslint-disable class-methods-use-this, object-shorthand, no-unused-vars, no-use-before-define, no-new, max-len, no-restricted-syntax, guard-for-in, no-continue */
+/* eslint-disable object-shorthand, no-unused-vars, no-use-before-define, max-len, no-restricted-syntax, guard-for-in, no-continue */
 import $ from 'jquery';
 import _ from 'underscore';

app/assets/javascripts/blob/pdf/index.js

-/* eslint-disable no-new */
 import Vue from 'vue';
 import pdfLab from '../../pdf/index.vue';

app/assets/javascripts/blob_edit/blob_bundle.js

-/* eslint-disable func-names, space-before-function-paren, prefer-arrow-callback, no-var, quotes, vars-on-top, no-unused-vars, no-new, max-len */
-/* global EditBlob */
+/* eslint-disable no-new */
 import $ from 'jquery';
 import NewCommitForm from '../new_commit_form';

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

-/* eslint-disable comma-dangle, space-before-function-paren, one-var */
+/* eslint-disable comma-dangle */
 import Sortable from 'sortablejs';
 import Vue from 'vue';

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

-/* eslint-disable comma-dangle, space-before-function-paren, no-alert */
+/* eslint-disable comma-dangle, no-alert */
 import $ from 'jquery';
 import Vue from 'vue';

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

-/* eslint-disable comma-dangle, space-before-function-paren, no-new */
+/* eslint-disable comma-dangle, no-new */
 import $ from 'jquery';
 import Vue from 'vue';

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

-/* eslint-disable func-names, no-new, space-before-function-paren, one-var, promise/catch-or-return, max-len */
+/* eslint-disable func-names, no-new, promise/catch-or-return */
 import $ from 'jquery';
 import axios from '~/lib/utils/axios_utils';

app/assets/javascripts/boards/filtered_search_boards.js

-/* eslint-disable class-methods-use-this */
 import FilteredSearchContainer from '../filtered_search/container';
 import FilteredSearchManager from '../filtered_search/filtered_search_manager';

app/assets/javascripts/boards/index.js

-/* eslint-disable one-var, quote-props, comma-dangle, space-before-function-paren */
+/* eslint-disable quote-props, comma-dangle */
 import $ from 'jquery';
 import _ from 'underscore';

app/assets/javascripts/boards/mixins/sortable_default_options.js

-/* eslint-disable no-unused-vars, no-mixed-operators, comma-dangle */
 /* global DocumentTouch */
 import $ from 'jquery';

app/assets/javascripts/boards/models/issue.js

-/* eslint-disable no-unused-vars, space-before-function-paren, arrow-body-style, arrow-parens, comma-dangle, max-len */
+/* eslint-disable no-unused-vars, comma-dangle */
 /* global ListLabel */
 /* global ListMilestone */
 /* global ListAssignee */

app/assets/javascripts/boards/models/list.js

-/* eslint-disable space-before-function-paren, no-underscore-dangle, class-methods-use-this, consistent-return, no-shadow, no-param-reassign, max-len, no-unused-vars */
+/* eslint-disable no-underscore-dangle, class-methods-use-this, consistent-return, no-shadow, no-param-reassign, max-len */
 /* global ListIssue */
 import ListLabel from '~/vue_shared/models/label';

app/assets/javascripts/boards/models/milestone.js

-/* eslint-disable no-unused-vars */
-
 class ListMilestone {
   constructor(obj) {
     this.id = obj.id;

app/assets/javascripts/boards/stores/boards_store.js

-/* eslint-disable comma-dangle, space-before-function-paren, one-var, no-shadow, dot-notation, max-len */
+/* eslint-disable comma-dangle, no-shadow */
 /* global List */
 import $ from 'jquery';

app/assets/javascripts/build_artifacts.js

-/* eslint-disable func-names, prefer-arrow-callback, no-return-assign */
+/* eslint-disable func-names, prefer-arrow-callback */
 import $ from 'jquery';
 import { visitUrl } from './lib/utils/url_utility';

app/assets/javascripts/commit/image_file.js

-/* eslint-disable func-names, space-before-function-paren, wrap-iife, no-var, no-use-before-define, prefer-arrow-callback, no-else-return, consistent-return, prefer-template, quotes, one-var, one-var-declaration-per-line, no-unused-vars, no-return-assign, comma-dangle, quote-props, no-unused-expressions, no-sequences, object-shorthand, max-len */
+/* eslint-disable func-names, wrap-iife, no-var, prefer-arrow-callback, no-else-return, consistent-return, prefer-template, quotes, one-var, one-var-declaration-per-line, no-unused-vars, no-return-assign, comma-dangle, quote-props, no-unused-expressions, no-sequences, max-len */
 import $ from 'jquery';
@@ -95,7 +95,7 @@ export default class ImageFile {
     });
     return [maxWidth, maxHeight];
   }
-  // eslint-disable-next-line
+
   views = {
     'two-up': function() {
       return $('.two-up.view .wrap', this.file).each((function(_this) {

app/assets/javascripts/compare_autocomplete.js

-/* eslint-disable func-names, space-before-function-paren, one-var, no-var, one-var-declaration-per-line, object-shorthand, comma-dangle, prefer-arrow-callback, no-else-return, newline-per-chained-call, wrap-iife, max-len */
+/* eslint-disable func-names, one-var, no-var, one-var-declaration-per-line, object-shorthand, no-else-return, max-len */
 import $ from 'jquery';
 import { __ } from './locale';

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

-/* eslint-disable comma-dangle, object-shorthand, func-names, no-else-return, guard-for-in, no-restricted-syntax, one-var, space-before-function-paren, no-lonely-if, no-continue, brace-style, max-len, quotes */
-/* global DiscussionMixins */
+/* eslint-disable comma-dangle, object-shorthand, func-names, no-else-return, guard-for-in, no-restricted-syntax, no-lonely-if, no-continue, brace-style, max-len, quotes */
 /* global CommentsStore */
 import $ from 'jquery';
 import Vue from 'vue';
-import '../mixins/discussion';
+import DiscussionMixins from '../mixins/discussion';
 const JumpToDiscussion = Vue.extend({
   mixins: [DiscussionMixins],