Remove the Ticket from Assembla

def delete(self):
        """
        Remove the Ticket from Assembla
        """
        if not hasattr(self, 'space'):
            raise AttributeError("A ticket must have a 'space' attribute before you can remove it from Assembla.")

        return self.space.api._delete_json(
            self,
            space=self.space,
            rel_path=self.space._build_rel_path('tickets'),
        )