removing the temporary image used for pulling from the proxy.

cmd/fetcher/fetcher.go

@@ -164,6 +164,7 @@ func (fetcher *Fetcher) pullAndPin(pullAll bool) error {
 				if err != nil {
 					klog.Warningf("Could not tag '%s' -> '%s'", container, tag)
 				}
+				_ = containerd.Remove(container)
 			}
 		}
 	}