remove assert

Author: TomAugspurger

pandas/core/indexes/base.py

@@ -525,7 +525,6 @@ def _simple_new(cls, values, name=None, dtype=None, **kwargs):
         if isinstance(values, (ABCSeries, cls)):
             values = np.asarray(values._values)
 
-        assert isinstance(values, np.ndarray)
         result = object.__new__(cls)
         result._data = values
         result.name = name