Error: 'an empty namespace may not be set' on make delete-route-rules

[Mike Binns]

When trying to delete route rules after running into #3 get the error:

~/git/Istio101$ make delete-route-rules
./istio-0.6/bin/istioctl delete routerules frontend-route
Error: 1 error occurred:

* cannot delete frontend-route: an empty namespace may not be set when a resource name is provided
Makefile:65: recipe for target 'delete-route-rules' failed
make: [delete-route-rules] Error 255 (ignored)
./istio-0.6/bin/istioctl delete routerules middleware-dev-route
Error: 1 error occurred:

* cannot delete middleware-dev-route: an empty namespace may not be set when a resource name is provided
Makefile:65: recipe for target 'delete-route-rules' failed
make: [delete-route-rules] Error 255 (ignored)
./istio-0.6/bin/istioctl delete routerules middleware-route
Error: 1 error occurred:

* cannot delete middleware-route: an empty namespace may not be set when a resource name is provided
Makefile:65: recipe for target 'delete-route-rules' failed
make: [delete-route-rules] Error 255 (ignored)
./istio-0.6/bin/istioctl delete routerules backend-route
Error: 1 error occurred:

* cannot delete backend-route: an empty namespace may not be set when a resource name is provided
Makefile:65: recipe for target 'delete-route-rules' failed
make: [delete-route-rules] Error 255 (ignored)

[Sandeep Dinesh]

Closing because of all the changes with Istio 1.0 (i.e RouteRules don't exist anymore)