Revert "wip adding mail visibiliy settings"

This reverts commit 40eb3c81fcc7951d5120dd4a813f1489398a2462.

src/client/js/components/Admin/App/AppSetting.jsx

@@ -81,31 +81,6 @@ class AppSetting extends React.Component {
           >
             {t('admin:app_setting.default_language')}
           </label>
-          <div className="col-md-6 py-2">
-            <input
-              className="custom-control-input"
-              type="radio"
-              name="mail-setting"
-              id="1"
-            />
-            <label className="custom-control-label" htmlFor="1">公開</label>
-            <input
-              className="custom-control-input"
-              type="radio"
-              name="mail-setting"
-              id="2"
-            />
-            <label className="custom-control-label" htmlFor="2">非公開</label>
-          </div>
-        </div>
-
-        <div className="row form-group mb-5">
-          <label
-            className="text-left text-md-right col-md-3 col-form-label"
-          >
-            {/* {t('admin:app_setting.default_language')} */}
-            {'新規ユーザーのデフォルトメール公開設定'}
-          </label>
           <div className="col-md-6 py-2">
             {
               localeMetadatas.map(meta => (