LibJS+LibWeb: Stop generating is_foo_wrapper() for JS DOM wrappers

Libraries/LibJS/Runtime/Object.h

@@ -112,7 +112,6 @@ public:
     virtual bool is_array() const { return false; }
     virtual bool is_function() const { return false; }
     virtual bool is_typed_array() const { return false; }
-    virtual bool is_node_wrapper() const { return false; }
 
     virtual const char* class_name() const override { return "Object"; }
     virtual void visit_edges(Cell::Visitor&) override;

Libraries/LibWeb/Bindings/RangePrototype.cpp

@@ -80,7 +80,7 @@ JS_DEFINE_NATIVE_FUNCTION(RangePrototype::set_start)
     if (vm.exception())
         return {};
 
-    if (!arg0->is_node_wrapper()) {
+    if (!is<NodeWrapper>(arg0)) {
         vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "Node");
         return {};
     }
@@ -103,7 +103,7 @@ JS_DEFINE_NATIVE_FUNCTION(RangePrototype::set_end)
     if (vm.exception())
         return {};
 
-    if (!arg0->is_node_wrapper()) {
+    if (!is<NodeWrapper>(arg0)) {
         vm.throw_exception<JS::TypeError>(global_object, JS::ErrorType::NotA, "Node");
         return {};
     }

Libraries/LibWeb/CodeGenerators/WrapperGenerator.cpp

@@ -480,7 +480,6 @@ public:
 
     generator.append(R"~~~(
 private:
-    virtual bool is_@wrapper_class:snakecase@() const final { return true; }
 )~~~");
 
     for (auto& function : interface.functions) {