[turbofan] Remove unused constructor function matching from typer.

src/compiler/typer.h

Index: src/compiler/typer.h
diff --git a/src/compiler/typer.h b/src/compiler/typer.h
index 5c59b5610bf8ab2bcb795873942067a2c6a659ed..f5ef4f15535821c5ab5a43a323b35050651e78cc 100644
--- a/src/compiler/typer.h
+++ b/src/compiler/typer.h
@@ -18,8 +18,8 @@ class TyperCache;
 
 class Typer {
  public:
-  Typer(Isolate* isolate, Graph* graph, Type::FunctionType* function_type,
-        MaybeHandle<Context> context);
+  Typer(Isolate* isolate, Graph* graph,
+        Type::FunctionType* function_type = nullptr);
   ~Typer();
 
   void Run();
@@ -31,7 +31,6 @@ class Typer {
   class Decorator;
 
   Graph* graph() const { return graph_; }
-  MaybeHandle<Context> context() const { return context_; }
   Zone* zone() const { return graph()->zone(); }
   Isolate* isolate() const { return isolate_; }
   Type::FunctionType* function_type() const { return function_type_; }
@@ -39,7 +38,6 @@ class Typer {
   Isolate* const isolate_;
   Graph* const graph_;
   Type::FunctionType* function_type_;
-  MaybeHandle<Context> const context_;
   Decorator* decorator_;
   TyperCache const& cache_;