Hello Jason,
You can edit this file to remove that fields: \media\com_easysocial\apps\fields\group\type\themes\default\content.php . Here I have attached to you a file, please download it and put it in your site.
Regarding the second image, you can enable the lock down mode for your site. You can find this setting here: Joomla > Components > EasySocial > Settings > General > Enable lockdown mode = Yes . By enabling this settings, your site will be a private site and you need to enable Allow registrations in lockdown mode in order to new user to register.
If you have anymore question, please don't hesitate to ask us.
Hope this will help.
Thanks.