Hi Paul,
Thanks for reaching out!
To remove the organizer field altogether, you can do a template override of the edit-event.php file found at wp-content/plugins/the-events-calendar-community-events/src/views/community. You’ll want to remove the following line from your copy of the template:
<?php tribe_get_template_part( 'community/modules/organizer' ); ?>
If you are trying to set the organizer to the current user automatically, this is not something that is available out of the box. You could get this set up with a customization – instead of removing the line above, you’ll want to modify the organizer.php file in the modules folder (in your copy of the file, not directly in the theme files).
We are limited in the amount of support that we can provide for customizations, but if you get stuck or have any questions, please let me know – I’ll be happy to point you in the right direction!
Thanks,
Jennifer