1) Go to the relevant project and click on the "Files" tab.
2) Select the desired file folder or the desired file and click on the 3-dot icon the 3-dot icon located under the file/folder name.
3) Now select the "Delete" entry in the menu that opens
4) Confirm the following request "Are you sure you want to delete this file/folder? file/folder?" by clicking on the "Delete" button.
Good to know: