Remove mypy overrides for tests/test_pycode/test_pycode_ast.py (#13586)

Author: adamtheturtle

pyproject.toml

@@ -330,8 +330,6 @@ module = [
     "tests.test_extensions.test_ext_napoleon_docstring",
     # tests/test_intl
     "tests.test_intl.test_intl",
-    # tests/test_pycode
-    "tests.test_pycode.test_pycode_ast",
     # tests/test_transforms
     "tests.test_transforms.test_transforms_post_transforms",
     # tests/test_util

tests/test_pycode/test_pycode_ast.py

@@ -65,9 +65,10 @@
         ('*tuple[str, int]', '*tuple[str, int]'),  # Starred
     ],
 )  # fmt: skip
-def test_unparse(source, expected):
-    module = ast.parse(source)
-    assert ast_unparse(module.body[0].value, source) == expected
+def test_unparse(source: str, expected: str) -> None:
+    expr = ast.parse(source).body[0]
+    assert isinstance(expr, ast.Expr)
+    assert ast_unparse(expr.value, source) == expected
 
 
 def test_unparse_None() -> None: