Remove the deprecated context disposal GC heuristic.

src/api.cc

Index: src/api.cc
===================================================================
--- src/api.cc	(revision 4002)
+++ src/api.cc	(working copy)
@@ -438,7 +438,6 @@
 void V8::DisposeGlobal(i::Object** obj) {
   LOG_API("DisposeGlobal");
   if (!i::V8::IsRunning()) return;
-  if ((*obj)->IsGlobalContext()) i::Heap::NotifyContextDisposedDeprecated();
   i::GlobalHandles::Destroy(obj);
 }
 
@@ -2887,13 +2886,6 @@
   i::Handle<i::Context> env;
   {
     ENTER_V8;
-#if defined(ANDROID)
-    // On mobile device, full GC is expensive, leave it to the system to
-    // decide when should make a full GC.
-#else
-    // Give the heap a chance to cleanup if we've disposed contexts.
-    i::Heap::CollectAllGarbageIfContextDisposedDeprecated();
-#endif
     v8::Handle<ObjectTemplate> proxy_template = global_template;
     i::Handle<i::FunctionTemplateInfo> proxy_constructor;
     i::Handle<i::FunctionTemplateInfo> global_constructor;