use builtin ast module as is

hiku/compat.py

@@ -1,20 +1,8 @@
 import sys
-import ast as _ast
-from typing import Any
 
 PY310: bool = sys.version_info >= (3, 10)
 
 
-# TODO: maybe we can remove this custom class ?
-class _AST:
-    def __getattr__(self, name: str) -> Any:
-        return getattr(_ast, name)
-
-    arguments = _ast.arguments
-
-
-ast = _AST()
-
 if sys.version_info >= (3, 10):
     from typing import Concatenate, ParamSpec, TypeAlias
 else:
@@ -23,7 +11,6 @@ def __getattr__(self, name: str) -> Any:
 
 __all__ = [
     "PY310",
-    "ast",
     "Concatenate",
     "ParamSpec",
     "TypeAlias",

hiku/expr/compiler.py

@@ -1,8 +1,8 @@
+import ast as py
 from contextlib import contextmanager
 from collections import Counter
 
 from ..types import CallableMeta
-from ..compat import ast as py
 
 from .core import THIS
 from .nodes import Symbol, Keyword