fix(email): lock templates to built-in catalog

src/Settings/DisplayPageGroups.php

@@ -193,7 +193,6 @@ trait DisplayPageGroups {
             'trackcode'                   => self::trackcode(),
             'seo'                         => self::get_seo_settings(),
             'mail'                        => self::get_smtp(),
-            'email_events'                => self::get_email_event_config(),
             'footer'                      => self::get_footer_settings(),
             'tabbar'                      => self::get_footer_tabbar_settings(),
             'floating_buttons'            => self::get_floating_buttons_settings(),