Remove unnecessary extra md5 import.
Remove unnecessary extra md5 import.

chriskuehl/gsutil-debian,ttiurani/gsutil,dimfeld/gsutil,craigcitro/gsutil,GoogleCloudPlatform/gsutil,BrandonY/gsutil,GoogleCloudPlatform/gsutil,dtjackson/gsutil,fishjord/gsutil,mattdr/gsutil