etcdctl/ctlv3: remove unnecessary 'return'

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

etcdctl/ctlv3/command/compaction_command.go

@@ -57,7 +57,6 @@ func compactionCommandFunc(cmd *cobra.Command, args []string) {
 	cancel()
 	if cerr != nil {
 		ExitWithError(ExitError, cerr)
-		return
 	}
 	fmt.Println("compacted revision", rev)
 }