metropolis/pkg/fsquota/quotactl: remove redundant parentheses

Change-Id: I66f0394814094c32f52fb11b8fe703c45b131f36
Reviewed-on: https://review.monogon.dev/c/monogon/+/2964
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/metropolis/pkg/fsquota/quotactl/quotactl.go b/metropolis/pkg/fsquota/quotactl/quotactl.go
index 08be6e0..9f44ab3 100644
--- a/metropolis/pkg/fsquota/quotactl/quotactl.go
+++ b/metropolis/pkg/fsquota/quotactl/quotactl.go
@@ -36,7 +36,7 @@
 )
 
 const (
-	Q_SYNC uint = ((0x800001 + iota) << 8)
+	Q_SYNC uint = (0x800001 + iota) << 8
 	Q_QUOTAON
 	Q_QUOTAOFF
 	Q_GETFMT