Remove duplicate docker install

This was causing gate failures after we started using the
airshipctl docker-install script [0].

[0]: https://review.opendev.org/c/airship/sip/+/785248

Change-Id: Ibcd5ae8fb7ffc2b5d0d968945e67d7e0641a9f09

README.md

@@ -109,6 +109,10 @@ USE_PROXY=true
 - `10.96.0.0/12` is the Kubernetes service IP range
 - `192.168.0.0/16` is the Kubernetes pod IP range
 
+#### Install Docker
+
+See [https://docs.docker.com/engine/install/ubuntu/][].
+
 #### Deploy kubernetes using minikube and create k8s cluster
 
 ```

tools/deployment/install-k8s.sh

@@ -11,21 +11,10 @@ set -ex
 
 export DEBCONF_NONINTERACTIVE_SEEN=true
 export DEBIAN_FRONTEND=noninteractive
-curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
-
-sudo apt-key fingerprint 0EBFCD88
-
-sudo add-apt-repository \
-  "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
-  $(lsb_release -cs) \
-  stable"
 
 sudo -E apt-get update
 
 sudo -E apt-get install -y \
-  docker-ce \
-  docker-ce-cli \
-  containerd.io \
   socat \
   jq \
   util-linux \