Restore construct_array_type

Author: TomAugspurger

pandas/core/dtypes/dtypes.py

@@ -541,6 +541,17 @@ def tz(self):
         """The timezone."""
         return self._tz
 
+    @classmethod
+    def construct_array_type(cls):
+        """Return the array type associated with this dtype
+
+        Returns
+        -------
+        type
+        """
+        from pandas import DatetimeIndex
+        return DatetimeIndex
+
     @classmethod
     def construct_from_string(cls, string):
         """