diff --git a/workbook.go b/workbook.go
index 257795b..c5bdb70 100644
--- a/workbook.go
+++ b/workbook.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"encoding/binary"
 	"io"
-	"log"
 	"os"
 	"unicode/utf16"
 )