diff --git a/xarray/core/groupby.py b/xarray/core/groupby.py
index 59d7e6c9ad6..ceae79031f8 100644
--- a/xarray/core/groupby.py
+++ b/xarray/core/groupby.py
@@ -50,7 +50,6 @@
 )
 from xarray.core.variable import IndexVariable, Variable
 from xarray.namedarray.pycompat import is_chunked_array
-from xarray.util.deprecation_helpers import _deprecate_positional_args
 
 if TYPE_CHECKING:
     from numpy.typing import ArrayLike
@@ -244,7 +243,9 @@ def to_array(self) -> DataArray:
 T_Group = Union["T_DataArray", _DummyGroup]
 
 
-def _ensure_1d(group: T_Group, obj: T_DataWithCoords) -> tuple[
+def _ensure_1d(
+    group: T_Group, obj: T_DataWithCoords
+) -> tuple[
     T_Group,
     T_DataWithCoords,
     Hashable | None,
diff --git a/xarray/core/weighted.py b/xarray/core/weighted.py
index bd3a6ce7d54..269cb49a2c1 100644
--- a/xarray/core/weighted.py
+++ b/xarray/core/weighted.py
@@ -11,7 +11,6 @@
 from xarray.core.computation import apply_ufunc, dot
 from xarray.core.types import Dims, T_DataArray, T_Xarray
 from xarray.namedarray.utils import is_duck_dask_array
-from xarray.util.deprecation_helpers import _deprecate_positional_args
 
 # Weighted quantile methods are a subset of the numpy supported quantile methods.
 QUANTILE_METHODS = Literal[