Disable soon to be deprecated APIs per default for v8

test/cctest/test-weakmaps.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
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 //       notice, this list of conditions and the following disclaimer.
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-// TODO(mythria): Remove this after this flag is turned on globally
-#define V8_IMMINENT_DEPRECATION_WARNINGS
-
 #include <utility>
 
 #include "src/v8.h"
 
 #include "src/global-handles.h"
 #include "test/cctest/cctest.h"
 
 using namespace v8::internal;
 
 static Isolate* GetIsolateFrom(LocalContext* context) {
@@ skipping 219 matching lines @@
   {
     HandleScope scope(isolate);
     AllocateJSWeakMap(isolate);
     SimulateIncrementalMarking(heap);
   }
   // The weak map is marked black here but leaving the handle scope will make
   // the object unreachable. Aborting incremental marking will clear all the
   // marking bits which makes the weak map garbage.
   heap->CollectAllGarbage();
 }