remove logging statement

now that httpcache hides the actual HTTP calls, this logging line
doesn't accurately reflect when the images is actually fetched.  It
would be nice to get accurate logging back again.

proxy/proxy.go

@@ -151,7 +151,6 @@ func (p *Proxy) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 }
 
 func (p *Proxy) fetchRemoteImage(u string) (*data.Image, error) {
-	glog.Infof("fetching remote image: %s", u)
 	resp, err := p.Client.Get(u)
 	if err != nil {
 		return nil, err