You are not able to delete users, locations, and checklist questions that have been saved within the system. A way to go about removing them would be to make them “active” or “inactive”. This is because with users, locations, and questions that have already been saved, there may be important data that is connected to them, and deleting them would create holes in your data
When a user, location are made inactive, they are still seen by admin users and anyone who has been assigned a role that would allow them access, however, it will have a line through it that makes it clear that hey are inactive
When a checklist question is made inactive it will not be seen. If you select the top "See All" button on the top right hand side of the page you will be able to see them though