diff --git a/pkg/index/index.go b/pkg/index/index.go
index 5b08fbd59..2ba24b46f 100644
--- a/pkg/index/index.go
+++ b/pkg/index/index.go
@@ -492,7 +492,7 @@ func (x *Index) PathLookup(signer, base *blobref.BlobRef, suffix string, at time
 	}
 
 	for _, path := range paths {
-		t, err := time.Parse(time.RFC3339, trimRFC3339Subseconds(path.ClaimDate))
+		t, err := time.Parse(time.RFC3339, path.ClaimDate)
 		if err != nil {
 			continue
 		}
@@ -514,14 +514,6 @@ func (x *Index) PathLookup(signer, base *blobref.BlobRef, suffix string, at time
 	return best, nil
 }
 
-// TODO(bradfitz): remove this as of Go 1. shouldn't be needed anymore.
-func trimRFC3339Subseconds(s string) string {
-	if !strings.HasSuffix(s, "Z") || len(s) < 20 || s[19] != '.' {
-		return s
-	}
-	return s[:19] + "Z"
-}
-
 func (x *Index) ExistingFileSchemas(wholeRef *blobref.BlobRef) (schemaRefs []*blobref.BlobRef, err error) {
 	it := x.queryPrefix(keyWholeToFileRef, wholeRef)
 	defer closeIterator(it, &err)