You can remove a reference file from a project, but the file remains on your local computer.
To add a removed reference file, use the Add Files action on the Reference Files tab.
To remove a reference file:
Remove from the list only
Removes the reference file from the files list, but retains the reference files resources in the project folder on your computer
Remove from the list and move the following resources to Archive folder
Removes the reference file from the files list and moves them to the archive folder inside the project folder on your local computer