Use our sum (#18)

Author: flying-sheep

tests/test_stats.py

@@ -96,10 +96,5 @@ def test_sum_benchmark(
     except NotImplementedError:
         pytest.skip("random_array not implemented for dtype")
 
-    def sum(arr: Array[Any], axis: int | None) -> Array[Any]:  # noqa: A001
-        if hasattr(arr, "sum"):
-            return arr.sum(axis=axis)
-        return np.sum(arr, axis=axis)  # type: ignore[arg-type]
-
-    sum(arr, axis=axis)  # warmup: numba compile
-    benchmark(sum, arr, axis=axis)
+    stats.sum(arr, axis=axis)  # type: ignore[arg-type]  # warmup: numba compile
+    benchmark(stats.sum, arr, axis=axis)