[interpreter] Remove BytecodeArrayBuilder::Illegal().

src/interpreter/bytecode-array-builder.cc

 // Copyright 2015 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/interpreter/bytecode-array-builder.h"
 
 #include "src/compiler.h"
 #include "src/interpreter/bytecode-array-writer.h"
 #include "src/interpreter/bytecode-peephole-optimizer.h"
 #include "src/interpreter/interpreter-intrinsics.h"
@@ skipping 748 matching lines @@
 }
 
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::Return() {
   SetReturnPosition();
   Output(Bytecode::kReturn);
   exit_seen_in_block_ = true;
   return *this;
 }
 
-BytecodeArrayBuilder& BytecodeArrayBuilder::Illegal() {
-  Output(Bytecode::kIllegal);
-  return *this;
-}
-
 BytecodeArrayBuilder& BytecodeArrayBuilder::Debugger() {
   Output(Bytecode::kDebugger);
   return *this;
 }
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::ForInPrepare(
     Register cache_info_triple) {
   OperandScale operand_scale =
       Bytecodes::OperandSizesToScale(cache_info_triple.SizeOfOperand());
   OutputScaled(Bytecode::kForInPrepare, operand_scale,
@@ skipping 505 matching lines @@
 }
 
 uint32_t BytecodeArrayBuilder::UnsignedOperand(size_t value) {
   DCHECK_LE(value, kMaxUInt32);
   return static_cast<uint32_t>(value);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8