Remove Vagrant references as they are no longer used

Remove Vagrant references as they are no longer used

diff --git a/README.md b/README.md
index 876a2ad..af71371 100644
--- a/README.md
+++ b/README.md
@@ -197,23 +197,6 @@ installs you can ensure they are in sync by looking at `/etc/passwd` and
 - [Linking containers for a multiple container setup](https://meta.discourse.org/t/linking-containers-for-a-multiple-container-setup/20867)
 - [Using Rubygems mirror to improve connection problem in China](https://meta.discourse.org/t/replace-rubygems-org-with-taobao-mirror-to-resolve-network-error-in-china/21988/1)
 
-### Developing with Vagrant
-
-If you are looking to make modifications to this repository, you can easily test
-out your changes before committing, using the magic of
-[Vagrant](http://vagrantup.com).  Install Vagrant as per [the default
-instructions](http://docs.vagrantup.com/v2/installation/index.html), and
-then run:
-
-    vagrant up
-
-This will spawn a new Ubuntu VM, install Docker, and then await your
-instructions.  You can then SSH into the VM with `vagrant ssh`, become
-`root` with `sudo -i`, and then you're right to go.  Your live git repo is
-already available at `/vagrant`, so you can just `cd /vagrant`
-and then start running `launcher`.
-
-
 License
 ===
 MIT
diff --git a/Vagrantfile b/Vagrantfile
deleted file mode 100644
index 254e141..0000000
--- a/Vagrantfile
+++ /dev/null
@@ -1,38 +0,0 @@
-Vagrant.configure(2) do |config|
-  config.vm.provider "virtualbox" do |v|
-    v.memory = 2048
-    v.cpus = 4
-  end
-
-  config.vm.define :dockerhost do |config|
-    config.vm.box = "ubuntu/xenial64"
-    config.vm.network "private_network", ip: ENV["DISCOURSE_DOCKER_HOST_IP"] || "192.168.33.11"
-
-    if Vagrant.has_plugin?("vagrant-disksize")
-      config.disksize.size = ENV["DISCOURSE_DOCKER_HOST_DISKSIZE"] || "50GB"
-    else
-      raise "The vagrant-disksize plugin required to expand the vm disk size. " +
-            "Run 'vagrant plugin install vagrant-disksize'."
-    end
-
-    if ENV["http_proxy"]
-      config.vm.provision "shell", inline: <<-EOF
-        echo "Acquire::http::Proxy \\"#{ENV['http_proxy']}\\";" >/etc/apt/apt.conf.d/50proxy
-        echo "http_proxy=\"#{ENV['http_proxy']}\"" >/etc/profile.d/http_proxy.sh
-      EOF
-    end
-
-    config.vm.provision "shell", inline: <<-EOF
-      set -e
-
-      export DEBIAN_FRONTEND=noninteractive
-
-      echo "en_US.UTF-8 UTF-8" >/etc/locale.gen
-      locale-gen
-      echo "Apt::Install-Recommends 'false';" >/etc/apt/apt.conf.d/02no-recommends
-      echo "Acquire::Languages { 'none' };" >/etc/apt/apt.conf.d/05no-languages
-      apt-get update
-      wget -qO- https://get.docker.com/ | sh
-    EOF
-  end
-end

GitHub sha: 4ee18c8d