remove printf
remove printf

Signed-off-by: Victor Vieux <ce584ac70734cfa5a848cd28039798932c7ea675@docker.com>

BlueDragonX/dockerclient,dnephin/dockerclient,crhym3/dockerclient,donhcd/dockerclient,yhat/go-docker,denverdino/dockerclient,turtlebender/dockerclient,bajh/dockerclient,flavio/dockerclient,selvik/dockerclient,abronan/dockerclient,samalba/dockerclient,ibuildthecloud/dockerclient,ehazlett/dockerclient,yp-engineering/dockerclient,appfront/go-docker,divideandconquer/dockerclient,jimmyxian/dockerclient,curoverse/dockerclient