[turbofan] Drop V8_TURBOFAN_BACKEND and V8_TURBOFAN_TARGET defines.

test/cctest/compiler/test-pipeline.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 #include "test/cctest/cctest.h"
 
 #include "src/compiler.h"
 #include "src/compiler/pipeline.h"
 #include "src/handles.h"
 #include "src/parser.h"
 
 using namespace v8::internal;
 using namespace v8::internal::compiler;
 
 static void RunPipeline(Zone* zone, const char* source) {
   Handle<JSFunction> function = v8::Utils::OpenHandle(
       *v8::Handle<v8::Function>::Cast(CompileRun(source)));
   ParseInfo parse_info(zone, function);
   CHECK(Compiler::ParseAndAnalyze(&parse_info));
   CompilationInfo info(&parse_info);
 
   Pipeline pipeline(&info);
-#if V8_TURBOFAN_TARGET
   Handle<Code> code = pipeline.GenerateCode();
-  CHECK(Pipeline::SupportedTarget());
   CHECK(!code.is_null());
-#else
-  USE(pipeline);
-#endif
 }
 
 
 TEST(PipelineTyped) {
   HandleAndZoneScope handles;
   FLAG_turbo_types = true;
   RunPipeline(handles.main_zone(), "(function(a,b) { return a + b; })");
 }
 
 
 TEST(PipelineGeneric) {
   HandleAndZoneScope handles;
   FLAG_turbo_types = false;
   RunPipeline(handles.main_zone(), "(function(a,b) { return a + b; })");
 }