diff --git a/internal/atlas/image.go b/internal/atlas/image.go
index ccd4a98a3..83004d5e3 100644
--- a/internal/atlas/image.go
+++ b/internal/atlas/image.go
@@ -35,8 +35,6 @@ type temporaryBytes struct {
 	pixels           []byte
 	pos              int
 	notFullyUsedTime int
-
-	m sync.Mutex
 }
 
 var theTemporaryBytes temporaryBytes