remove default steps from terminal

[Mano Marks]

These steps are appearing again in the default terminal, please turn them off:

1. Initializes cluster master node:

kubeadm init --apiserver-advertise-address $(hostname -i)

2. Initialize cluster networking:

kubectl apply -n kube-system -f
"https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 |tr -d '\n')"

3. (Optional) Create an nginx deployment:

kubectl apply -f https://raw.githubusercontent.com/kubernetes/website/master/cn/docs/user-guide/nginx-app.yaml