Don't exit after handling daemon mode

The function that called us has just created a temp dir, and scheduled a defer
to remove it again; by calling os.Exit we short-cut this defer, and don't clean
up the temp dir. There is no reason to exit here, the calling function will
return after having called us.

pkg/app/daemon/daemon.go

@@ -76,8 +76,6 @@ func Handle(common *common.Common) {
 	if err := instruction.run(common); err != nil {
 		log.Fatal(err)
 	}
-
-	os.Exit(0)
 }
 
 func InDaemonMode() bool {