virtualbox.org

Wondering if there is any way to delete a directory from my VB VM?

If you have questions about how to operate your chosen guest OS, then please ask those questions in an appropriate forum, e.g. the Ubuntu forums would be appropriate if it was Ubuntu.

If your question is how to delete a VM in VirtualBox, then you right click the VM in the manager and select "Remove".

I think that my guest OS is Fedora. Does that sound feasible? Then I should check a Fedora forum?

Sounds like a good choice.