Remove unnecessary comments

mapstructure.go

diff --git a/mapstructure.go b/mapstructure.go
index ac680c5..9ef46c9 100644
--- a/mapstructure.go
+++ b/mapstructure.go
@@ -164,9 +164,6 @@
 		return fmt.Errorf("'%s' expected a map, got '%s'", name, dataVal.Kind())
 	}
 
-	//dataValType := dataVal.Type()
-	//dataKeyType := dataValType.Key()
-
 	valType := val.Type()
 	valKeyType := valType.Key()
 	valElemType := valType.Elem()