Remove TypingResetter.

This code was used exclusively by its own unit test and can be safely removed.

BUG=v8:4947
LOG=N

Review-Url: https://codereview.chromium.org/1965373002
Cr-Commit-Position: refs/heads/master@{#36180}

BUILD.gn

@@ -1445,8 +1445,6 @@ v8_source_set("v8_base") {
     "src/types.h",
     "src/typing-asm.cc",
     "src/typing-asm.h",
-    "src/typing-reset.cc",
-    "src/typing-reset.h",
     "src/unicode-cache-inl.h",
     "src/unicode-cache.h",
     "src/unicode-decoder.cc",

src/typing-reset.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/v8.h"
-
-#include "src/typing-reset.h"
-
-#include "src/ast/ast.h"
-#include "src/ast/scopes.h"
-#include "src/codegen.h"
-
-namespace v8 {
-namespace internal {
-
-
-TypingReseter::TypingReseter(Isolate* isolate, FunctionLiteral* root)
-    : AstExpressionVisitor(isolate, root) {}
-
-
-void TypingReseter::VisitExpression(Expression* expression) {
-  expression->set_bounds(Bounds::Unbounded());
-}
-}  // namespace internal
-}  // namespace v8

src/typing-reset.h

-// 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.
-
-#ifndef V8_TYPING_RESET_H_
-#define V8_TYPING_RESET_H_
-
-#include "src/ast/ast-expression-visitor.h"
-
-namespace v8 {
-namespace internal {
-
-// A Visitor over a CompilationInfo's AST that resets
-// typing bounds back to their default.
-
-class TypingReseter : public AstExpressionVisitor {
- public:
-  TypingReseter(Isolate* isolate, FunctionLiteral* root);
-
- protected:
-  void VisitExpression(Expression* expression) override;
-};
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_TYPING_RESET_H_

src/v8.gyp

@@ -1115,8 +1115,6 @@
         'types.h',
         'typing-asm.cc',
         'typing-asm.h',
-        'typing-reset.cc',
-        'typing-reset.h',
         'unicode-inl.h',
         'unicode.cc',
         'unicode.h',

test/cctest/cctest.gyp

@@ -176,7 +176,6 @@
         'test-transitions.cc',
         'test-typedarrays.cc',
         'test-types.cc',
-        'test-typing-reset.cc',
         'test-unbound-queue.cc',
         'test-unboxed-doubles.cc',
         'test-unique.cc',