Click the Delete link for that file in the Currently Displayed Files or Available Files section.
A pop-up window will open that asks the question Are you sure you want to delete this file, 'File Name'?
Click the Delete File button to delete the file or clickClose this Window to keep the file in the wiki
Note: Deleting this file will remove the file from the Writing Studio server and it will no longer show on any pages in this wiki. If you only want to stop displaying this file on the current page, please use the Remove option.