Update Vagrant to Windows 10

Vagrantfile

@@ -7,41 +7,17 @@ Vagrant.configure("2") do |config|
   config.vm.synced_folder ".", "/vagrant", disabled: false
 
   config.vm.define "linux" do |this|
-    this.vm.box = "trueability/ubuntu-16.04"
+    this.vm.box = "trueability/ubuntu-20.04"
     this.vm.hostname = "linux"
     # this.vm.provision "shell", path: "scripts/vagrant/bootstrap.sh"
   end
 
-  config.vm.define "ubuntu-16.04" do |this|
-    this.vm.box = "trueability/ubuntu-16.04"
-    this.vm.hostname = "ubuntu-1604"
-    # this.vm.provision "shell", path: "scripts/vagrant/bootstrap.sh"
-  end
-
-  config.vm.define "centos-7" do |this|
-    this.vm.box = "trueability/centos-7"
-    this.vm.hostname = "centos-7"
-    # this.vm.provision "shell", path: "scripts/vagrant/bootstrap.sh"
-  end
-
   config.vm.define "windows" do |this|
-    this.vm.box = "trueability/windows-server-2012-r2"
-    this.vm.hostname = "windows"
-    # this.vm.provision "shell", path: "scripts/vagrant/bootstrap.ps1"
-  end
-
-  config.vm.define "windows-10-enterprise" do |this|
     this.vm.box = "senglin/win-10-enterprise-vs2015community"
     this.vm.hostname = "windows"
     # this.vm.provision "shell", path: "scripts/vagrant/bootstrap.ps1"
   end
 
-  config.vm.define "windows-server-2012-r2" do |this|
-    this.vm.box = "trueability/windows-server-2012-r2"
-    this.vm.hostname = "windows"
-    # this.vm.provision "shell", path: "scripts/vagrant/bootstrap.ps1"
-  end
-
   config.vm.provider "virtualbox" do |v|
     v.memory = "4192"
     v.cpus = "4"