Update memmap.go

remove unnecessary comment

memmap.go

diff --git a/memmap.go b/memmap.go
index bdce2cc..a34326b 100644
--- a/memmap.go
+++ b/memmap.go
@@ -211,7 +211,6 @@
 	if os.IsNotExist(err) && (flag&os.O_CREATE > 0) {
 		file, err = m.Create(name)
 		chmod = true
-		// if we create a new file
 	}
 	if err != nil {
 		return nil, err