Revert "Retain backward compatibility. Enforce C order."

This reverts commit 3dc3b1b.

numpy/lib/index_tricks.py

@@ -534,19 +534,11 @@ class ndindex(object):
     """
     def __init__(self, *shape):
         x = as_strided(_nx.zeros(1), shape=shape, strides=_nx.zeros_like(shape))
-        self._it = _nx.nditer(x, flags=['multi_index'], order='C')
+        self._it = _nx.nditer(x, flags=['multi_index'])
 
     def __iter__(self):
         return self
 
-    def ndincr(self):
-        """
-        Increment the multi-dimensional index by one.
-
-        This method is for backward compatibility only: do not use.
-        """
-        self.next()
-
     def next(self):
         """
         Standard iterator method, updates the index and returns the index tuple.