get rid of old form validator

src/server/form/admin/userInvite.js

@@ -1,8 +0,0 @@
-const form = require('express-form');
-
-const field = form.field;
-
-module.exports = form(
-  field('inviteForm[emailList]', '招待メールアドレス').trim().required(),
-  field('inviteForm[sendEmail]').trim(),
-);

src/server/form/index.js

@@ -36,7 +36,6 @@ module.exports = {
     customlayout: require('./admin/customlayout'),
     customfeatures: require('./admin/customfeatures'),
     customhighlightJsStyle: require('./admin/customhighlightJsStyle'),
-    userInvite: require('./admin/userInvite'),
     slackIwhSetting: require('./admin/slackIwhSetting'),
     slackSetting: require('./admin/slackSetting'),
     userGroupCreate: require('./admin/userGroupCreate'),