Updates

* _values -> _data
* remove unused imports

Author: TomAugspurger

pandas/_libs/reduction.pyx

@@ -17,7 +17,6 @@ cnp.import_array()
 
 cimport util
 from lib import maybe_convert_objects
-from tslibs.conversion import NS_DTYPE, TD_DTYPE
 
 
 cdef _get_result_array(object obj, Py_ssize_t size, Py_ssize_t cnt):

pandas/core/indexes/timedeltas.py

@@ -315,7 +315,7 @@ def astype(self, dtype, copy=True):
             # Have to repeat the check for 'timedelta64' (not ns) dtype
             # so that we can return a numeric index, since pandas will return
             # a TimedeltaIndex when dtype='timedelta'
-            result = self._values.astype(dtype, copy=copy)
+            result = self._data.astype(dtype, copy=copy)
             if self.hasnans:
                 return Index(result, name=self.name)
             return Index(result.astype('i8'), name=self.name)