--- a/goduf.go	Sun Jun 29 15:14:16 2014 +0200
+++ b/goduf.go	Sun Jun 29 15:23:10 2014 +0200
@@ -60,8 +60,6 @@
 
 type sizeClass struct { // XXX still useful?
 	files    FileObjList
-	medsums  map[string]FileObjList
-	fullsums map[string]FileObjList
 }
 
 type dataT struct {
@@ -235,15 +233,6 @@
 		c1+c1b, c1, s1, c2)
 }
 
-func (data *dataT) filesWithSameHash() (hgroups []FileObjList) {
-	for _, sizeGroup := range data.sizeGroups {
-		for _, l := range sizeGroup.fullsums {
-			hgroups = append(hgroups, l)
-		}
-	}
-	return
-}
-
 // checksum returns the requested checksum as a string.
 // If the checksum has not been pre-computed, it is calculated now.
 func (fo fileObj) checksum(sType sumType) (string, error) {