clean up min/max empty cases

Author: topper-123

pandas/core/nanops.py

@@ -1068,18 +1068,13 @@ def reduction(
         skipna: bool = True,
         mask: npt.NDArray[np.bool_] | None = None,
     ) -> Dtype:
-        dtype = values.dtype
+        if values.size == 0:
+            return _na_for_min_count(values, axis)
+
         values, mask = _get_values(
             values, skipna, fill_value_typ=fill_value_typ, mask=mask
         )
-
-        if (axis is not None and values.shape[axis] == 0) or values.size == 0:
-            dtype_max = _get_dtype_max(dtype)
-            result = getattr(values, meth)(axis, dtype=dtype_max)
-            result.fill(np.nan)
-        else:
-            result = getattr(values, meth)(axis)
-
+        result = getattr(values, meth)(axis)
         result = _maybe_null_out(result, axis, mask, values.shape)
         return result