Remove --limit option to select node to delete (#4001)

--limit doesn't work when using remove-node.yml as there is group listing with "hosts: kube-master" in the playbook. Thus, remove-node/pre-remove/post-remove tasks are skipped as they are filtered by group "hosts: kube-master"

docs/getting-started.md

@@ -56,22 +56,12 @@ Add worker nodes to the list under kube-node if you want to delete them (or util
     ansible-playbook -i inventory/mycluster/hosts.ini remove-node.yml -b -v \
         --private-key=~/.ssh/private_key
 
-
-We support two ways to select the nodes:
-
-- Use `--extra-vars "node=<nodename>,<nodename2>"` to select the node you want to delete.
+Use `--extra-vars "node=<nodename>,<nodename2>"` to select the node you want to delete.
 ```
 ansible-playbook -i inventory/mycluster/hosts.ini remove-node.yml -b -v \
   --private-key=~/.ssh/private_key \
   --extra-vars "node=nodename,nodename2"
 ```
-or
-- Use `--limit nodename,nodename2` to select the node
-```
-ansible-playbook -i inventory/mycluster/hosts.ini remove-node.yml -b -v \
-  --private-key=~/.ssh/private_key \
-  --limit nodename,nodename2"
-```
 
 Connecting to Kubernetes
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