Revert "Make v8::TryCatch able to consume natively thrown exceptions (again)."

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 66692b8dd9ea4e656a32d00333633e561a4e248d..c33365b931fab61d8513b050df60321fac395877 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -1830,12 +1830,6 @@ v8::TryCatch::~TryCatch() {
     reinterpret_cast<Isolate*>(isolate_)->ThrowException(exc);
     ASSERT(!isolate_->thread_local_top()->rethrowing_message_);
   } else {
-    if (HasCaught() && isolate_->has_scheduled_exception()) {
-      // If an exception was caught but is still scheduled because no API call
-      // promoted it, then it is canceled to prevent it from being propagated.
-      // Note that this will not cancel termination exceptions.
-      isolate_->CancelScheduledExceptionFromTryCatch(this);
-    }
     isolate_->UnregisterTryCatchHandler(this);
     v8::internal::SimulatorStack::UnregisterCTryCatch();
   }