[regexp] remove some dead code.

src/regexp/regexp-macro-assembler-tracer.cc

 // Copyright 2012 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/regexp/regexp-macro-assembler-tracer.h"
 
 #include "src/ast/ast.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 351 matching lines @@
 void RegExpMacroAssemblerTracer::CheckNotBackReferenceIgnoreCase(
     int start_reg, bool read_backward, Label* on_no_match) {
   PrintF(" CheckNotBackReferenceIgnoreCase(register=%d, %s, label[%08x]);\n",
          start_reg, read_backward ? "backward" : "forward",
          LabelToInt(on_no_match));
   assembler_->CheckNotBackReferenceIgnoreCase(start_reg, read_backward,
                                               on_no_match);
 }
 
 
+void RegExpMacroAssemblerTracer::CheckPosition(int cp_offset,
+                                               Label* on_outside_input) {
+  PrintF(" CheckPosition(cp_offset=%d, label[%08x]);\n", cp_offset,
+         LabelToInt(on_outside_input));
+  assembler_->CheckPosition(cp_offset, on_outside_input);
+}
+
+
 bool RegExpMacroAssemblerTracer::CheckSpecialCharacterClass(
     uc16 type,
     Label* on_no_match) {
   bool supported = assembler_->CheckSpecialCharacterClass(type,
                                                           on_no_match);
   PrintF(" CheckSpecialCharacterClass(type='%c', label[%08x]): %s;\n",
          type,
          LabelToInt(on_no_match),
          supported ? "true" : "false");
   return supported;
@@ skipping 30 matching lines @@
 }
 
 
 Handle<HeapObject> RegExpMacroAssemblerTracer::GetCode(Handle<String> source) {
   PrintF(" GetCode(%s);\n", source->ToCString().get());
   return assembler_->GetCode(source);
 }
 
 }  // namespace internal
 }  // namespace v8