got rid of stack function

src/vm.h

@@ -102,7 +102,7 @@ public:
     // for quick access
     Type tp_object, tp_type, tp_int, tp_float, tp_bool, tp_str;
     Type tp_list, tp_tuple;
-    Type tp_function, tp_stack_func, tp_native_func, tp_iterator, tp_bound_method;
+    Type tp_function, tp_native_func, tp_iterator, tp_bound_method;
     Type tp_slice, tp_range, tp_module;
     Type tp_super, tp_exception, tp_bytes, tp_mappingproxy;
 
@@ -427,7 +427,6 @@ DEF_NATIVE_2(List, tp_list)
 DEF_NATIVE_2(Tuple, tp_tuple)
 DEF_NATIVE_2(Function, tp_function)
 DEF_NATIVE_2(NativeFunc, tp_native_func)
-DEF_NATIVE_2(StackFunc, tp_stack_func)
 DEF_NATIVE_2(BoundMethod, tp_bound_method)
 DEF_NATIVE_2(Range, tp_range)
 DEF_NATIVE_2(Slice, tp_slice)
@@ -863,7 +862,6 @@ inline void VM::init_builtin_types(){
     tp_module = _new_type_object("module");
     tp_function = _new_type_object("function");
     tp_native_func = _new_type_object("native_func");
-    tp_stack_func = _new_type_object("stack_func");
     tp_iterator = _new_type_object("iterator");
     tp_bound_method = _new_type_object("bound_method");
     tp_super = _new_type_object("super");
@@ -931,17 +929,6 @@ inline PyObject* VM::vectorcall(int ARGC, int KWARGC, bool op_call){
         // [unbound, self, args..., kwargs...]
     }
 
-    if(is_non_tagged_type(callable, tp_stack_func)) {
-        const auto& f = OBJ_GET(StackFunc, callable);
-        if(ARGC != 0) TypeError("stack_func does not track argument counts ");
-        if(KWARGC != 0) TypeError("stack_func does not accept keyword arguments");
-        f(this);
-        PyObject* ret = s_data.top();
-        s_data.reset(p0);
-        return ret;
-    }
-
-
     ArgsView args(p1 - ARGC - int(method_call), p1);
 
     if(is_non_tagged_type(callable, tp_native_func)){