remove card

resource/locales/en_US/admin/admin.json

@@ -27,9 +27,6 @@
     "attach_enable": "You can attach files other than image files if you enable this option.",
     "update": "Update",
     "mail_settings": "E-mail Settings",
-    "smtp_used": "If you have SMTP settings, it will be used.",
-    "smtp_but_aws": "If you do not have SMTP settings but AWS settings,  e-mails will be sent by SES.",
-    "neihter_of": "If neither is selected, then no email will be sent.",
     "from_e-mail_address": "From e-mail address",
     "smtp_settings": "SMTP settings",
     "host": "Host",

resource/locales/ja_JP/admin/admin.json

@@ -27,9 +27,6 @@
     "attach_enable": "許可をしている場合、画像以外のファイルをページに添付可能になります。",
     "update": "更新",
     "mail_settings": "メールの設定",
-    "smtp_used": "SMTPの設定がされている場合、それが利用されます。",
-    "smtp_but_aws": "SMTP設定がなく、AWSの設定がある場合、SESでの送信を試みます。",
-    "neihter_of": "どちらの設定もない場合、メールは送信されません。",
     "from_e-mail_address": "Fromアドレス",
     "smtp_settings": "SMTP設定",
     "host": "ホスト",

resource/locales/zh_CN/admin/admin.json

@@ -27,9 +27,6 @@
 		"attach_enable": "如果启用此选项，则可以附加图像文件以外的文件。",
 		"update": "更新",
 		"mail_settings": "邮件设置",
-		"smtp_used": "如果您有SMTP设置，将使用它。",
-		"smtp_but_aws": "如果您没有SMTP设置，但有AWS设置，则电子邮件将由SES发送。",
-		"neihter_of": "如果两者都未选中，则不会发送电子邮件。",
 		"from_e-mail_address": "From e-mail address",
 		"smtp_settings": "SMTP 设置",
 		"host": "服务器",

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

@@ -60,7 +60,6 @@ class MailSetting extends React.Component {
 
     return (
       <React.Fragment>
-        <p className="card well">{t('admin:app_setting.smtp_used')} {t('admin:app_setting.smtp_but_aws')}<br />{t('admin:app_setting.neihter_of')}</p>
         <div className="row form-group mb-5">
           <label className="col-md-3 col-form-label text-left">{t('admin:app_setting.from_e-mail_address')}</label>
           <div className="col-md-6">