Remove unnecessary error check.

Change-Id: I331c9f8342de08e0efd9ed006f71fb56eae26620

cmd/slothfs-multifs/main.go

diff --git a/cmd/slothfs-multifs/main.go b/cmd/slothfs-multifs/main.go
index 2a88277..f9f9a93 100644
--- a/cmd/slothfs-multifs/main.go
+++ b/cmd/slothfs-multifs/main.go
@@ -71,10 +71,6 @@
 	}
 
 	root := fs.NewMultiFS(service, cache, opts)
-	if err != nil {
-		log.Fatalf("NewManifestFS: %v", err)
-	}
-
 	server, _, err := nodefs.MountRoot(mntDir, root, &nodefs.Options{
 		EntryTimeout:    time.Hour,
 		NegativeTimeout: time.Hour,