If you have checked a file out from the shared folder, there will be a copy of the file in the shared folder and a copy of the file in your user folder. The content of the two files might be different. If you want to remove the copy of the file from your user folder without updating the version in the shared folder you can undo the check-out.

In the list of project files, select the Checked Out files, and then click Files >Actions > Undo Check Out.