build: remove Vagrantfile

This Vagrantfile hasn't been maintained for a long time and no longer
produces a correct and functioning development environment for Terraform.

Terraform's development environment is a pretty standard Go development
environment, so a custom VM setup for development is overkill. Maintaining
the Makefile and other similar dev environment helpers is already overhead
enough, and having this stale Vagrantfile here was occasionally causing
folks to try to use it and get frustrated that it didn't work.

Vagrantfile

@@ -1,92 +0,0 @@
-# -*- mode: ruby -*-
-# vi: set ft=ruby :
-
-# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
-VAGRANTFILE_API_VERSION = "2"
-
-# Software version variables
-GOVERSION = "1.11.5"
-UBUNTUVERSION = "16.04"
-
-# CPU and RAM can be adjusted depending on your system
-CPUCOUNT = "2"
-RAM = "4096"
-
-$script = <<SCRIPT
-GOVERSION="#{GOVERSION}"
-SRCROOT="/opt/go"
-SRCPATH="/opt/gopath"
-
-# Get the ARCH
-ARCH="$(uname -m | sed 's|i686|386|' | sed 's|x86_64|amd64|')"
-
-# Install Prereq Packages
-export DEBIAN_PRIORITY=critical
-export DEBIAN_FRONTEND=noninteractive
-export DEBCONF_NONINTERACTIVE_SEEN=true
-APT_OPTS="--assume-yes --no-install-suggests --no-install-recommends -o Dpkg::Options::=\"--force-confdef\" -o Dpkg::Options::=\"--force-confold\""
-echo "Upgrading packages ..."
-apt-get update ${APT_OPTS} >/dev/null
-apt-get upgrade ${APT_OPTS} >/dev/null
-echo "Installing prerequisites ..."
-apt-get install ${APT_OPTS} build-essential curl git-core libpcre3-dev mercurial pkg-config zip >/dev/null
-
-# Install Go
-echo "Downloading go (${GOVERSION}) ..."
-wget -P /tmp --quiet "https://storage.googleapis.com/golang/go${GOVERSION}.linux-${ARCH}.tar.gz"
-echo "Setting up go (${GOVERSION}) ..."
-tar -C /opt -xf "/tmp/go${GOVERSION}.linux-${ARCH}.tar.gz"
-chmod 775 "$SRCROOT"
-chown vagrant:vagrant "$SRCROOT"
-
-# Setup the GOPATH; even though the shared folder spec gives the working
-# directory the right user/group, we need to set it properly on the
-# parent path to allow subsequent "go get" commands to work.
-mkdir -p "$SRCPATH"
-chown -R vagrant:vagrant "$SRCPATH" 2>/dev/null || true
-# ^^ silencing errors here because we expect this to fail for the shared folder
-
-cat >/etc/profile.d/gopath.sh <<EOF
-export GOPATH="$SRCPATH"
-export GOROOT="$SRCROOT"
-export PATH="$SRCROOT/bin:$SRCPATH/bin:\$PATH"
-EOF
-chmod 755 /etc/profile.d/gopath.sh
-
-grep -q -F 'cd /opt/gopath/src/github.com/hashicorp/terraform' /home/vagrant/.bashrc || cat >>/home/vagrant/.bashrc <<EOF
-
-## After login, change to terraform directory
-cd /opt/gopath/src/github.com/hashicorp/terraform
-EOF
-
-SCRIPT
-
-Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
-  config.vm.box = "bento/ubuntu-#{UBUNTUVERSION}"
-  config.vm.hostname = "terraform"
-
-  config.vm.provision "prepare-shell", type: "shell", inline: "sudo sed -i '/tty/!s/mesg n/tty -s \\&\\& mesg n/' /root/.profile", privileged: false
-  config.vm.provision "initial-setup", type: "shell", inline: $script
-  config.vm.synced_folder '.', '/opt/gopath/src/github.com/hashicorp/terraform'
-
-  config.vm.provider "docker" do |v, override|
-    override.vm.box = "tknerr/baseimage-ubuntu-#{UBUNTUVERSION}"
-  end
-
-  ["vmware_fusion", "vmware_workstation"].each do |p|
-    config.vm.provider p do |v|
-      v.vmx["memsize"] = "#{RAM}"
-      v.vmx["numvcpus"] = "#{CPUCOUNT}"
-    end
-  end
-
-  config.vm.provider "virtualbox" do |v|
-    v.memory = "#{RAM}"
-    v.cpus = "#{CPUCOUNT}"
-  end
-
-  config.vm.provider "parallels" do |prl|
-    prl.memory = "#{RAM}"
-    prl.cpus = "#{CPUCOUNT}"
-  end
-end