Resolve eslint error for multiple exports

Problem to solve

Pipe failed: https://gitlab.com/gitlab-jh/gitlab/-/jobs/1778042993

Please help improve our error logging by following the instructions on this issue:
    https://gitlab.com/gitlab-org/gitlab/-/issues/345513
/builds/gitlab-org-forks/gitlab/jh/app/assets/javascripts/lib/utils/url_utility.js
  1:1   error  Multiple exports of name 'PROMO_HOST'  import/export
  1:1   error  Multiple exports of name 'PROMO_URL'   import/export
  4:14  error  Multiple exports of name 'PROMO_HOST'  import/export
  7:14  error  Multiple exports of name 'PROMO_URL'   import/export
✖ 4 problems (4 errors, 0 warnings)
error Command failed with exit code 1.