Option.iniUsedName was never used
diff --git a/option.go b/option.go
index 26f2441..86bd030 100644
--- a/option.go
+++ b/option.go
@@ -68,9 +68,8 @@
 	// The struct field value which the option represents.
 	value reflect.Value
 
-	iniUsedName string
-	tag         multiTag
-	isSet       bool
+	tag   multiTag
+	isSet bool
 }
 
 // LongNameWithNamespace returns the option's long name with the group namespaces