[turbofan] Enable deoptimization for non-asm.js TurboFan code.

test/cctest/test-heap.cc

Index: test/cctest/test-heap.cc
diff --git a/test/cctest/test-heap.cc b/test/cctest/test-heap.cc
index 94a50e5a85792367d10c49c13c4a448d0ed606b1..d441ab6afe2c03c999b89be96e8ca6f491e7de11 100644
--- a/test/cctest/test-heap.cc
+++ b/test/cctest/test-heap.cc
@@ -4394,7 +4394,6 @@ static int GetCodeChainLength(Code* code) {
 TEST(NextCodeLinkIsWeak) {
   i::FLAG_always_opt = false;
   i::FLAG_allow_natives_syntax = true;
-  i::FLAG_turbo_deoptimization = true;
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   v8::internal::Heap* heap = CcTest::heap();