I would like to know how to disable or remove the theme from the cPanel server.
The files relating to Paper Lantern should be automatically removed once your server has been updated to cPanel version 108: Paper Lantern Deprecation and Removal Schedule If you are on an earlier cPanel version you could either update to v108 or follow the guide below to force all users in your server to always use the Jupiter theme. How to Migrate from Paper Lantern to Jupiter