def delete(self):

		'''
		method to remove version from resource's history
		'''

		# send patch
		response = self.resource.repo.api.http_request('DELETE', self.uri)

		# if response 204
		if response.status_code == 204:
			logger.debug('deleting previous version of resource, %s' % self.uri)

			# remove from resource versions
			delattr(self._current_resource.versions, self.label)

		# if 400, likely most recent version and cannot remove
		elif response.status_code == 400:
			raise Exception('HTTP 400, likely most recent resource version which cannot be removed')

		else:
			raise Exception('HTTP %s, could not delete resource version: %s' % (response.status_code, self.uri))
method to remove version from resource's history