Thread/Isolate refactoring: new(Isolate) -> new(Zone)

runtime/vm/allocation.h

Index: runtime/vm/allocation.h
===================================================================
--- runtime/vm/allocation.h	(revision 44266)
+++ runtime/vm/allocation.h	(working copy)
@@ -98,11 +98,6 @@
   // Implicitly allocate the object in the current zone.
   void* operator new(uword size);
 
-  // DEPRECATED: Use Zone version.
-  // Implicitly allocate the object in the current zone given the current
-  // isolate.
-  void* operator new(uword size, BaseIsolate* isolate);
-
   // Allocate the object in the given zone, which must be the current zone.
   void* operator new(uword size, Zone* zone);