[turbofan] Drop V8_TURBOFAN_BACKEND and V8_TURBOFAN_TARGET defines.

test/cctest/compiler/test-run-deopt.cc

Index: test/cctest/compiler/test-run-deopt.cc
diff --git a/test/cctest/compiler/test-run-deopt.cc b/test/cctest/compiler/test-run-deopt.cc
index d89592432407004dce13721438a6edc73cac4018..d581ea092c0519de9a94cafc8eb60adb7c58c085 100644
--- a/test/cctest/compiler/test-run-deopt.cc
+++ b/test/cctest/compiler/test-run-deopt.cc
@@ -10,8 +10,6 @@
 using namespace v8::internal;
 using namespace v8::internal::compiler;
 
-#if V8_TURBOFAN_TARGET
-
 static void IsOptimized(const v8::FunctionCallbackInfo<v8::Value>& args) {
   JavaScriptFrameIterator it(CcTest::i_isolate());
   JavaScriptFrame* frame = it.frame();
@@ -103,7 +101,6 @@ TEST(DeoptExceptionHandlerFinally) {
 #endif
 }
 
-#endif
 
 TEST(DeoptTrivial) {
   FLAG_allow_natives_syntax = true;