Fix travis by removing pypy testing. (#745)
Fix travis by removing pypy testing. (#745)


zmarano/compute-image-packages,rjschwei/compute-image-packages,wrigri/compute-image-packages,rjschwei/compute-image-packages,zmarano/compute-image-packages,wrigri/compute-image-packages,illfelder/compute-image-packages,wrigri/compute-image-packages,illfelder/compute-image-packages,wrigri/compute-image-packages,GoogleCloudPlatform/compute-image-packages