After running ANT compile, some files not required are generated in Repo Workspace

HI ,

After running a ANT compile from Repo Workspace, some output files, not required to be kept in source control are being generated. obviously these are coming in Unresolved folder.

Now each time after running the compile, developer don't want to click on Undo from the pending changes view.

So, pls, is there any way to bypass this OR any way the unwanted output be best organized by not doing the undo operation every time.

Thanks for your help in advance.