Clean up callback interfaces.

filter/txnBuf/txnbuf_test.go

Index: filter/txnBuf/txnbuf_test.go
diff --git a/filter/txnBuf/txnbuf_test.go b/filter/txnBuf/txnbuf_test.go
index 62ecba2d03d3a316a821d0327e2e357d4aac88bb..d027ed331f39fb669740434e3bbed0dc64b6874f 100644
--- a/filter/txnBuf/txnbuf_test.go
+++ b/filter/txnBuf/txnbuf_test.go
@@ -856,20 +856,18 @@ func TestQuerySupport(t *testing.T) {
 					ds := datastore.Get(c)
 
 					q := datastore.NewQuery("Foo").Ancestor(root)
-					return ds.Run(q, func(pm datastore.PropertyMap, _ datastore.CursorCB) bool {
+					return ds.Run(q, func(pm datastore.PropertyMap) {
 						So(ds.RunInTransaction(func(c context.Context) error {
 							ds := datastore.Get(c)
 							pm["Value"] = append(pm["Value"], datastore.MkProperty("wat"))
 							return ds.Put(pm)
 						}, nil), ShouldBeNil)
-						return true
 					})
 				}, &datastore.TransactionOptions{XG: true}), ShouldBeNil)
 
-				So(ds.Run(datastore.NewQuery("Foo"), func(pm datastore.PropertyMap, _ datastore.CursorCB) bool {
+				So(ds.Run(datastore.NewQuery("Foo"), func(pm datastore.PropertyMap) {
 					val := pm["Value"]
 					So(val[len(val)-1].Value(), ShouldResemble, "wat")
-					return true
 				}), ShouldBeNil)
 			})