code: func (az *Cloud) DeleteRouteWithName(routeName string) error {
  	if az.Config.shouldOmitCloudProviderBackoff() {
  		ctx, cancel := getContextWithCancel()
  		defer cancel()
  
  		resp, err := az.RoutesClient.Delete(ctx, az.RouteTableResourceGroup, az.RouteTableName, routeName)
  		klog.V(10).Infof("RoutesClient.Delete(%s,%s): end", az.RouteTableName, routeName)
  		return az.processHTTPResponse(nil, "", resp, err)
  	}
  
  	return az.deleteRouteWithRetry(routeName)
  }
docs: // DeleteRouteWithName invokes az.RoutesClient.CreateOrUpdate with exponential backoff retry