Revert "Add additional advistory notices to getting started"

This reverts commit d14a2594d1.

# Conflicts:
#	get-started/part4.md

get-started/part5.md

@@ -109,14 +109,6 @@ with the following. Be sure to replace `username/repo:tag` with your image detai
 
 2.  Make sure your shell is configured to talk to `myvm1` (full examples are [here](part4.md#configure-a-docker-machine-shell-to-the-swarm-manager)).
 
-> Docker Machine is in maintenance mode
->
-> This tutorial uses Docker Machine to setup local virtual machines for your cluster.
->  As of July 2018, Docker Machine is in [maintenance mode](https://github.com/docker/machine/issues/4537). 
-> Only bugfixes will be added. Provisioning on a variety of cloud providers 
-> is better achieved using [infrakit](https://github.com/docker/deploykit). 
-{: .important }
-
     * Run `docker-machine ls` to list machines and make sure you are connected to `myvm1`, as indicated by an asterisk next to it.
 
     * If needed, re-run `docker-machine env myvm1`, then run the given command to configure the shell.

get-started/part6.md

@@ -9,6 +9,7 @@ description: Deploy your app to production using Docker CE or EE.
 
 - [Install Docker](/install/index.md).
 - Get [Docker Compose](/compose/overview.md) as described in [Part 3 prerequisites](/get-started/part3.md#prerequisites).
+- Get [Docker Machine](/machine/overview.md) as described in [Part 4 prerequisites](/get-started/part4.md#prerequisites).
 - Read the orientation in [Part 1](index.md).
 - Learn how to create containers in [Part 2](part2.md).