code: def delete_guest_property(self, name):
          
          if not isinstance(name, basestring):
              raise TypeError("name can only be an instance of type basestring")
          self._call("deleteGuestProperty",
                       in_p=[name])
docs: Deletes an entry from the machine's guest property store.
  
          in name of type str
              The name of the property to delete.
  
          raises :class:`VBoxErrorInvalidVmState`
              Machine session is not open.