remove all unused eslint-disable rules

spec/javascripts/helpers/vue_resource_helper.js

@@ -5,7 +5,6 @@ export const headersInterceptor = (request, next) => {
     response.headers.forEach((value, key) => {
       headers[key] = value;
     });
-    // eslint-disable-next-line no-param-reassign
     response.headers = headers;
   });
 };

spec/javascripts/issuable_time_tracker_spec.js

-/* eslint-disable no-unused-vars, space-before-function-paren, func-call-spacing, no-spaced-func, semi, max-len, quotes, space-infix-ops, padded-blocks */
+/* eslint-disable no-unused-vars, func-call-spacing, no-spaced-func, semi, quotes, space-infix-ops, max-len */
 import $ from 'jquery';
 import Vue from 'vue';

spec/javascripts/issue_spec.js

-/* eslint-disable space-before-function-paren, one-var, one-var-declaration-per-line, no-use-before-define, comma-dangle, max-len */
+/* eslint-disable one-var, one-var-declaration-per-line, no-use-before-define, comma-dangle */
 import $ from 'jquery';
 import MockAdapter from 'axios-mock-adapter';

spec/javascripts/job_spec.js

@@ -304,7 +304,6 @@ describe('Job', () => {
   describe('getBuildTrace', () => {
     it('should request build trace with state parameter', (done) => {
       spyOn(axios, 'get').and.callThrough();
-      // eslint-disable-next-line no-new
       job = new Job();
       setTimeout(() => {

spec/javascripts/line_highlighter_spec.js

-/* eslint-disable space-before-function-paren, no-var, no-param-reassign, quotes, prefer-template, no-else-return, new-cap, dot-notation, no-return-assign, comma-dangle, no-new, one-var, one-var-declaration-per-line, jasmine/no-spec-dupes, no-underscore-dangle, max-len */
+/* eslint-disable no-var, quotes, prefer-template, no-else-return, dot-notation, no-return-assign, comma-dangle, no-new, one-var, one-var-declaration-per-line, no-underscore-dangle, max-len */
 import $ from 'jquery';
 import LineHighlighter from '~/line_highlighter';

spec/javascripts/merge_request_spec.js

-/* eslint-disable space-before-function-paren, no-return-assign */
+/* eslint-disable no-return-assign */
 import $ from 'jquery';
 import MockAdapter from 'axios-mock-adapter';

spec/javascripts/mini_pipeline_graph_dropdown_spec.js

-/* eslint-disable no-new */
-
 import $ from 'jquery';
 import MockAdapter from 'axios-mock-adapter';
 import axios from '~/lib/utils/axios_utils';

spec/javascripts/monitoring/mock_data.js

-/* eslint-disable quote-props, indent, comma-dangle */
-
 export const mockApiEndpoint = `${gl.TEST_HOST}/monitoring/mock`;
 export const metricsGroupsAPIResponse = {

spec/javascripts/new_branch_spec.js

-/* eslint-disable space-before-function-paren, one-var, no-var, one-var-declaration-per-line, no-return-assign, quotes, max-len */
+/* eslint-disable one-var, no-var, one-var-declaration-per-line, no-return-assign, quotes, max-len */
 import $ from 'jquery';
 import NewBranchForm from '~/new_branch_form';

spec/javascripts/notes_spec.js

-/* eslint-disable space-before-function-paren, no-unused-expressions, no-var, object-shorthand, comma-dangle, max-len */
+/* eslint-disable no-unused-expressions, no-var, object-shorthand */
 import $ from 'jquery';
 import _ from 'underscore';
 import MockAdapter from 'axios-mock-adapter';

spec/javascripts/right_sidebar_spec.js

-/* eslint-disable space-before-function-paren, no-var, one-var, one-var-declaration-per-line, new-parens, no-return-assign, new-cap, vars-on-top, max-len */
+/* eslint-disable no-var, one-var, one-var-declaration-per-line, no-return-assign, vars-on-top, max-len */
 import $ from 'jquery';
 import MockAdapter from 'axios-mock-adapter';

spec/javascripts/search_autocomplete_spec.js

-/* eslint-disable space-before-function-paren, max-len, no-var, one-var, one-var-declaration-per-line, no-unused-expressions, consistent-return, no-param-reassign, default-case, no-return-assign, comma-dangle, object-shorthand, prefer-template, quotes, new-parens, vars-on-top, new-cap, max-len */
+/* eslint-disable max-len, no-var, one-var, one-var-declaration-per-line, no-unused-expressions, consistent-return, no-param-reassign, default-case, no-return-assign, object-shorthand, prefer-template, vars-on-top, max-len */
 import $ from 'jquery';
 import '~/gl_dropdown';

spec/javascripts/syntax_highlight_spec.js

-/* eslint-disable space-before-function-paren, no-var, no-return-assign, quotes */
+/* eslint-disable no-var, no-return-assign, quotes */
 import $ from 'jquery';
 import syntaxHighlight from '~/syntax_highlight';

spec/javascripts/u2f/mock_u2f_device.js

-/* eslint-disable prefer-rest-params, wrap-iife,
-no-unused-expressions, no-return-assign, no-param-reassign */
+/* eslint-disable wrap-iife, no-unused-expressions, no-return-assign, no-param-reassign */
 export default class MockU2FDevice {
   constructor() {