There are instances in which you won't want mod_passenger installed. For example, if you're going to use mod_userdir.
Passenger can be removed through
WHM >> Home >> Software >> EasyApache 4 >> Ruby via Passenger ( remove here, continue the process).
Or you can remove it via the command line with the following command:
yum erase ea-ruby24-mod_passenger
Passenger is required for NGINX reverse proxy. This will also disable a part of the Ruby Application Manager, so please check with a Systems Administrator if you are uncertain what impact removing mod_passenger will have on your server.