[wasm] Drop old typing-asm and its tests.

test/cctest/expression-type-collector.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_EXPRESSION_TYPE_COLLECTOR_H_
-#define V8_EXPRESSION_TYPE_COLLECTOR_H_
-
-#include "src/ast/ast-expression-visitor.h"
-
-namespace v8 {
-namespace internal {
-
-class AstTypeBounds;
-
-// A Visitor over an AST that collects a human readable string summarizing
-// structure and types. Used for testing of the typing information attached
-// to the expression nodes of an AST.
-
-struct ExpressionTypeEntry {
-  int depth;
-  const char* kind;
-  const AstRawString* name;
-  Bounds bounds;
-};
-
-class ExpressionTypeCollector : public AstExpressionVisitor {
- public:
-  ExpressionTypeCollector(Isolate* isolate, FunctionLiteral* root,
-                          const AstTypeBounds* bounds,
-                          ZoneVector<ExpressionTypeEntry>* dst);
-  void Run();
-
- protected:
-  void VisitExpression(Expression* expression);
-
- private:
-  const AstTypeBounds* bounds_;
-  ZoneVector<ExpressionTypeEntry>* result_;
-};
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_EXPRESSION_TYPE_COLLECTOR_H_