Remove np.asarray, as #28762 has been fixed

Author: Marco Gorelli

pandas/core/indexes/accessors.py

@@ -322,7 +322,7 @@ def __new__(cls, data):
         orig = data if is_categorical_dtype(data) else None
         if orig is not None:
             data = Series(
-                np.asarray(orig.values),
+                orig.values,
                 name=orig.name,
                 copy=False,
                 dtype=orig.values.categories.dtype,