cc: Remove unused proto conversion code.

cc/test/push_properties_counting_layer.cc

Index: cc/test/push_properties_counting_layer.cc
diff --git a/cc/test/push_properties_counting_layer.cc b/cc/test/push_properties_counting_layer.cc
index cb0bf3cbe3be1b712187cf1a3e5bd89bec0792e4..5719cc2cf9a55fe9b847f98fb8a7654015e22b69 100644
--- a/cc/test/push_properties_counting_layer.cc
+++ b/cc/test/push_properties_counting_layer.cc
@@ -32,9 +32,8 @@ std::unique_ptr<LayerImpl> PushPropertiesCountingLayer::CreateLayerImpl(
 }
 
 void PushPropertiesCountingLayer::ToLayerPropertiesProto(
-    proto::LayerUpdate* layer_update,
-    bool inputs_only) {
-  Layer::ToLayerPropertiesProto(layer_update, inputs_only);
+    proto::LayerProperties* proto) {
+  Layer::ToLayerPropertiesProto(proto);
   AddPushPropertiesCount();
 }