fusefrontend: Remove debug code.

This code was accidentially added in 4f66d66755.

internal/fusefrontend/openbackingdir_test.go

@@ -1,12 +1,9 @@
 package fusefrontend
 
 import (
-	"fmt"
-	"os"
 	"strings"
 	"syscall"
 	"testing"
-	"time"
 
 	"golang.org/x/sys/unix"
 
@@ -68,9 +65,7 @@ func TestOpenBackingDir(t *testing.T) {
 	}
 	err = syscallcompat.Faccessat(dirfd, cName, unix.R_OK)
 	if err != nil {
-		fmt.Printf("pid=%d dirfd=%d dir1->cName=%q: %v\n", os.Getpid(), dirfd, cName, err)
-		time.Sleep(600 * time.Second)
-		t.Errorf("dirfd=%d cName=%q: %v", dirfd, cName, err)
+		t.Error(err)
 	}
 	syscall.Close(dirfd)