api/users/list_userの使われていないexperienceを削除

app/views/api/users/_list_user.json.jbuilder

@@ -1,4 +1,4 @@
-json.(user, :id, :login_name, :name, :description, :github_account, :twitter_account, :facebook_url, :blog_url, :job_seeker, :free, :job, :os, :experience, :email, :roles, :primary_role, :icon_title, :cached_completed_percentage, :completed_fraction, :graduated_on)
+json.(user, :id, :login_name, :name, :description, :github_account, :twitter_account, :facebook_url, :blog_url, :job_seeker, :free, :job, :os, :email, :roles, :primary_role, :icon_title, :cached_completed_percentage, :completed_fraction, :graduated_on)
 json.tag_list user.tags.pluck(:name)
 json.url user_url(user)
 json.updated_at l(user.updated_at)
@@ -8,7 +8,6 @@ json.student user.student?
 json.card user.card?
 json.job_name t("activerecord.enums.user.job.#{user.job}")
 json.os_name t("activerecord.enums.user.os.#{user.os}")
-json.experience_name t("activerecord.enums.user.experience.#{user.experience}")
 json.student_or_trainee user.student_or_trainee?
 json.edit_admin_user_path edit_admin_user_path(user)
 json.isFollowing current_user.following?(user)