Update README.md (#735)
Update README.md (#735)

remove section on version updates; this is covered in repo doc
rjschwei/compute-image-packages,wrigri/compute-image-packages,zmarano/compute-image-packages,wrigri/compute-image-packages,illfelder/compute-image-packages,illfelder/compute-image-packages,zmarano/compute-image-packages,rjschwei/compute-image-packages,GoogleCloudPlatform/compute-image-packages,wrigri/compute-image-packages,wrigri/compute-image-packages