Disable default export rules

This is part of the work to implement the consensus reached in the
[RFC][1] to prefer named exports over defalt exports.

Future iterations will migrate existing default exports to named
exports.

The bulk of the changes in this commit were performed with the following
script:

```bash
set -u

changed-files()
{
    local trunk="origin/master"
    local file=
    local committed_files=$(git diff "$trunk"... --numstat \
        | awk '/\.(js|vue)$/{ print $3 }')
    local changed_files=$(git diff --numstat \
        | awk '/\.(js|vue)$/{ print $3 }')
    for file in ${committed_files[@]} ${changed_files[@]}; do
        if [ -f "$file" ]; then
            echo "$file"
        fi
    done
}

git grep -lz "import/prefer-default-export" -- '**/*.js' \
    | xargs -0 perl -0pi -e \
    "s/[^\n]*eslint-disable[^\n]*"\
"import\/prefer-default-export[^\n]*\n//mgs"

git grep -lz "rfcs/-/issues/20" -- '**/*.js' \
    | xargs -0 perl -0pi -e \
    "s/[^\n]*rfcs\/-\/issues\/20[^\n]*\n//mgs"

yarn prettier --write $(changed-files)
```

The script is [idempotent][2], to help make it easier to keep
up-to-date.

[1]: https://gitlab.com/gitlab-org/frontend/rfcs/-/issues/20
[2]: https://en.wikipedia.org/wiki/Idempotence

.eslintrc.yml

@@ -17,6 +17,7 @@ settings:
       config: './config/webpack.config.js'
 rules:
   import/no-commonjs: error
+  import/no-default-export: off
   no-underscore-dangle:
     - error
     - allow:

app/assets/javascripts/admin/statistics_panel/store/getters.js

@@ -3,7 +3,6 @@
  * and returns an array of the following form:
  * [{ key: "forks", label: "Forks", value: 50 }]
  */
-// eslint-disable-next-line import/prefer-default-export
 export const getStatistics = state => labels =>
   Object.keys(labels).map(key => {
     const result = {

app/assets/javascripts/batch_comments/index.js

@@ -3,7 +3,6 @@ import { mapActions } from 'vuex';
 import store from '~/mr_notes/stores';
 import ReviewBar from './components/review_bar.vue';
-// eslint-disable-next-line import/prefer-default-export
 export const initReviewBar = () => {
   const el = document.getElementById('js-review-bar');

app/assets/javascripts/ci_variable_list/constants.js

 import { __ } from '~/locale';
-// eslint-disable import/prefer-default-export
 export const ADD_CI_VARIABLE_MODAL_ID = 'add-ci-variable';
 export const displayText = {

app/assets/javascripts/ci_variable_list/store/getters.js

-/* eslint-disable import/prefer-default-export */
-// Disabling import/prefer-default-export can be
-// removed once a second getter is added to this file
 import { uniq } from 'lodash';
 export const joinedEnvironments = state => {

app/assets/javascripts/contributors/stores/actions.js

@@ -3,7 +3,6 @@ import { __ } from '~/locale';
 import service from '../services/contributors_service';
 import * as types from './mutation_types';
-// eslint-disable-next-line import/prefer-default-export
 export const fetchChartData = ({ commit }, endpoint) => {
   commit(types.SET_LOADING_STATE, true);

app/assets/javascripts/create_cluster/eks_cluster/constants.js

-// eslint-disable-next-line import/prefer-default-export
 export const KUBERNETES_VERSIONS = [{ name: '1.14', value: '1.14' }];

app/assets/javascripts/create_cluster/eks_cluster/store/getters.js

-// eslint-disable-next-line import/prefer-default-export
 export const subnetValid = ({ selectedSubnet }) =>
   Array.isArray(selectedSubnet) && selectedSubnet.length >= 2;

app/assets/javascripts/design_management/utils/tracking.js

@@ -5,7 +5,6 @@ const DESIGN_TRACKING_CONTEXT_SCHEMA = 'iglu:com.gitlab/design_management_contex
 const DESIGN_TRACKING_PAGE_NAME = 'projects:issues:design';
 const DESIGN_TRACKING_EVENT_NAME = 'view_design';
-// eslint-disable-next-line import/prefer-default-export
 export function trackDesignDetailView(
   referer = '',
   owner = '',

app/assets/javascripts/design_management_legacy/utils/tracking.js

@@ -5,7 +5,6 @@ const DESIGN_TRACKING_CONTEXT_SCHEMA = 'iglu:com.gitlab/design_management_contex
 const DESIGN_TRACKING_PAGE_NAME = 'projects:issues:design';
 const DESIGN_TRACKING_EVENT_NAME = 'view_design';
-// eslint-disable-next-line import/prefer-default-export
 export function trackDesignDetailView(
   referer = '',
   owner = '',

app/assets/javascripts/diffs/diff_file.js

@@ -18,7 +18,6 @@ function fileSymlinkInformation(file, fileList) {
   );
 }
-/* eslint-disable-next-line import/prefer-default-export */
 export function prepareRawDiffFile({ file, allFiles }) {
   Object.assign(file, {
     brokenSymlink: fileSymlinkInformation(file, allFiles),

app/assets/javascripts/diffs/utils/uuids.js

@@ -11,9 +11,6 @@
  * @typedef {String} UUIDv4
  */
-// https://gitlab.com/gitlab-org/frontend/rfcs/-/issues/20
-/* eslint-disable import/prefer-default-export */
-
 import MersenneTwister from 'mersenne-twister';
 import stringHash from 'string-hash';
 import { isString } from 'lodash';

app/assets/javascripts/environments/stores/helpers.js

@@ -4,5 +4,4 @@
  * @param {Object} environment
  * @returns {Object}
  */
-// eslint-disable-next-line import/prefer-default-export
 export const setDeployBoard = (oldEnvironmentState, environment) => environment;

app/assets/javascripts/error_tracking/store/details/actions.js

@@ -10,7 +10,6 @@ const stopPolling = poll => {
   if (poll) poll.stop();
 };
-// eslint-disable-next-line import/prefer-default-export
 export function startPollingStacktrace({ commit }, endpoint) {
   stackTracePoll = new Poll({
     resource: service,

app/assets/javascripts/error_tracking/store/details/getters.js

-// eslint-disable-next-line import/prefer-default-export
 export const stacktrace = state =>
   state.stacktraceData.stack_trace_entries
     ? state.stacktraceData.stack_trace_entries.reverse()

app/assets/javascripts/frequent_items/store/getters.js

-// eslint-disable-next-line import/prefer-default-export
 export const hasSearchQuery = state => state.searchQuery !== '';

app/assets/javascripts/ide/ide_router.js

@@ -33,7 +33,6 @@ const EmptyRouterComponent = {
   },
 };
-// eslint-disable-next-line import/prefer-default-export
 export const createRouter = store => {
   const router = new IdeRouter({
     mode: 'history',

app/assets/javascripts/ide/lib/diff/diff.js

 import { diffLines } from 'diff';
 import { defaultDiffOptions } from '../editor_options';
-// See: https://gitlab.com/gitlab-org/frontend/rfcs/-/issues/20
-// eslint-disable-next-line import/prefer-default-export
 export const computeDiff = (originalContent, newContent) => {
   // prevent EOL changes from highlighting the entire file
   const changes = diffLines(

app/assets/javascripts/ide/lib/editorconfig/parser.js

@@ -42,7 +42,6 @@ function getRulesWithConfigs(filePath, configFiles = [], rules = {}) {
   return isRoot ? result : getRulesWithConfigs(filePath, nextConfigs, result);
 }
-// eslint-disable-next-line import/prefer-default-export
 export function getRulesWithTraversal(filePath, getFileContent) {
   const editorconfigPaths = [
     ...getPathParents(filePath).map(x => `${x}/.editorconfig`),

app/assets/javascripts/ide/services/gql.js

@@ -17,5 +17,4 @@ const getClient = memoize(() =>
   ),
 );
-// eslint-disable-next-line import/prefer-default-export
 export const query = (...args) => getClient().query(...args);