The virtual machine on which University Edition runs is a UNIX, and therefore respects its user and assumes that said user knows what he/she's doing (if irony is found, you may keep it). It does not offer the "Trash Bin" functionality found on desktop systems like Windows or Mac/OS (or the more advanced GUIs on Linux, where such functionality is available for their file managers, but not the commandline).
It is a good idea to have some kind of backup mechanism that saves the contents of the shared folder to a different location, if you have critical data in there.
I just verified on my UE on a MacBook that deleting a file in UE does not move it to the Mac's Trash Bin, it deletes it for good.