Remove updating Docker, is already 1.13.1
Remove updating Docker, is already 1.13.1

StefanScherer/dockerfiles-windows,StefanScherer/dockerfiles-windows,StefanScherer/dockerfiles-windows,StefanScherer/dockerfiles-windows,StefanScherer/dockerfiles-windows,StefanScherer/dockerfiles-windows,StefanScherer/dockerfiles-windows