Cleanup /etc/motd after doc link shift

cluster/gce/configure-vm.sh

@@ -77,8 +77,6 @@ function set-broken-motd() {
 function reset-motd() {
   # kubelet is installed both on the master and nodes, and the version is easy to parse (unlike kubectl)
   local -r version="$(/usr/local/bin/kubelet --version=true | cut -f2 -d " ")"
-  # This regex grabs the minor version, e.g. v1.2.
-  local -r minor="$(echo ${version} | sed -r "s/(v[0-9]+\.[0-9]+).*/\1/g")"
   # This logic grabs either a release tag (v1.2.1 or v1.2.1-alpha.1),
   # or the git hash that's in the build info.
   local gitref="$(echo "${version}" | sed -r "s/(v[0-9]+\.[0-9]+\.[0-9]+)(-[a-z]+\.[0-9]+)?.*/\1\2/g")"
@@ -95,8 +93,8 @@ If it isn't, the closest tag is at:
 
 Welcome to Kubernetes ${version}!
 
-You can find documentation for this release at:
-  http://kubernetes.io/${minor}/
+You can find documentation for Kubernetes at:
+  http://docs.kubernetes.io/
 
 You can download the build image for this release at:
   https://storage.googleapis.com/kubernetes-release/release/${version}/kubernetes-src.tar.gz
@@ -106,6 +104,7 @@ It is based on the Kubernetes source at:
 ${devel}
 For Kubernetes copyright and licensing information, see:
   /usr/local/share/doc/kubernetes/LICENSES
+
 EOF
 }