code: def delete_service(self, service_name, params=None):
          
          if not self.space.has_service_with_name(service_name):
              logging.warning("Service not found so... succeeded?")
              return True
  
          guid = self.get_instance_guid(service_name)
          logging.info("Deleting service %s with guid %s" % (service_name, guid))
  
          # MAINT: this endpoint changes in newer version of api
          return self.api.delete("/v2/service_instances/%s?accepts_incomplete=true" %
              (guid), params=params)
docs: Delete the service of the given name.  It may fail if there are
          any service keys or app bindings.  Use purge() if you want
          to delete it all.