Remove unused GlobalHandles::IterateWeakRoots()

src/global-handles.cc

Index: src/global-handles.cc
diff --git a/src/global-handles.cc b/src/global-handles.cc
index 3f4e3bea59d5fb8d96e9435d3dbb0f6932ffd532..891f5452de2a252fbf8d27f15641df39cc1b4348 100644
--- a/src/global-handles.cc
+++ b/src/global-handles.cc
@@ -523,16 +523,6 @@ void GlobalHandles::IterateWeakRoots(ObjectVisitor* v) {
 }
 
 
-void GlobalHandles::IterateWeakRoots(WeakReferenceGuest f,
-                                     WeakReferenceCallback callback) {
-  for (NodeIterator it(this); !it.done(); it.Advance()) {
-    if (it.node()->IsWeak() && it.node()->callback() == callback) {
-      f(it.node()->object(), it.node()->parameter());
-    }
-  }
-}
-
-
 void GlobalHandles::IdentifyWeakHandles(WeakSlotCallback f) {
   for (NodeIterator it(this); !it.done(); it.Advance()) {
     if (it.node()->IsWeak() && f(it.node()->location())) {