Remove rows in 3D numpy array

axis should 1.

>>> import numpy
>>> a = [[[1,2,3],
...       [4,5,6],
...       [7,8,9]],
...      [[9,8,7],
...       [6,5,4],
...       [3,2,1]]]
>>> numpy.delete(a, 2, axis=1)
array([[[1, 2, 3],
        [4, 5, 6]],

       [[9, 8, 7],
        [6, 5, 4]]])