[turbofan] Drop V8_TURBOFAN_BACKEND and V8_TURBOFAN_TARGET defines.

src/compiler/code-generator.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/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/pipeline.h"
 #include "src/snapshot/serialize.h"  // TODO(turbofan): RootIndexMap
@@ skipping 636 matching lines @@
   } else {
     CHECK(false);
   }
 }
 
 
 void CodeGenerator::MarkLazyDeoptSite() {
   last_lazy_deopt_pc_ = masm()->pc_offset();
 }
 
-#if !V8_TURBOFAN_BACKEND
-
-void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
-  UNIMPLEMENTED();
-}
-
-
-void CodeGenerator::AssembleArchBranch(Instruction* instr,
-                                       BranchInfo* branch) {
-  UNIMPLEMENTED();
-}
-
-
-void CodeGenerator::AssembleArchBoolean(Instruction* instr,
-                                        FlagsCondition condition) {
-  UNIMPLEMENTED();
-}
-
-
-void CodeGenerator::AssembleArchJump(RpoNumber target) { UNIMPLEMENTED(); }
-
-
-void CodeGenerator::AssembleDeoptimizerCall(
-    int deoptimization_id, Deoptimizer::BailoutType bailout_type) {
-  UNIMPLEMENTED();
-}
-
-
-void CodeGenerator::AssemblePrologue() { UNIMPLEMENTED(); }
-
-
-void CodeGenerator::AssembleReturn() { UNIMPLEMENTED(); }
-
-
-void CodeGenerator::AssembleMove(InstructionOperand* source,
-                                 InstructionOperand* destination) {
-  UNIMPLEMENTED();
-}
-
-
-void CodeGenerator::AssembleSwap(InstructionOperand* source,
-                                 InstructionOperand* destination) {
-  UNIMPLEMENTED();
-}
-
-
-void CodeGenerator::AddNopForSmiCodeInlining() { UNIMPLEMENTED(); }
-
-
-void CodeGenerator::AssembleJumpTable(Label** targets, size_t target_count) {
-  UNIMPLEMENTED();
-}
-
-#endif  // !V8_TURBOFAN_BACKEND
-
 
 OutOfLineCode::OutOfLineCode(CodeGenerator* gen)
     : masm_(gen->masm()), next_(gen->ools_) {
   gen->ools_ = this;
 }
 
 
 OutOfLineCode::~OutOfLineCode() {}
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8