style: pre-commit fixes

src/awkward/operations/ak_cartesian.py

@@ -8,9 +8,8 @@
 from awkward._backends.numpy import NumpyBackend
 from awkward._dispatch import high_level_function
 from awkward._layout import HighLevelContext, ensure_same_backend, maybe_posaxis
-from awkward._namedaxis import _supports_named_axis
 from awkward._nplikes.numpy_like import NumpyMetadata
-from awkward._regularize import is_integer, regularize_axis
+from awkward._regularize import regularize_axis
 from awkward.errors import AxisError
 
 __all__ = ("cartesian",)