Remove Docker 17.05 CE, AppVeyor already has 17.06 EE

appveyor-build.ps1

@@ -5,17 +5,6 @@ Write-Host Starting build
 Write-Host Updating base images
 docker pull microsoft/nanoserver
 
-docker version
-Write-Host Updating Docker engine to master
-Stop-Service docker
-$version = "17.05.0-ce"
-$wc = New-Object net.webclient
-$wc.DownloadFile("https://get.docker.com/builds/Windows/x86_64/docker-$version.zip", "$env:TEMP\docker.zip")
-Expand-Archive -Path "$env:TEMP\docker.zip" -DestinationPath $env:ProgramFiles -Force
-Remove-Item "$env:TEMP\docker.zip"
-Start-Service docker
-docker version
-
 docker build -t whoami -f Dockerfile.windows .
 
 docker images