!9632 delete useless code

From: @jinyaohui
Reviewed-by: @zh_qh,@kingxian
Signed-off-by: @kingxian

mindspore/nn/layer/container.py

@@ -197,8 +197,6 @@ class CellList(_CellListBase, Cell):
         >>> cell_ls = nn.CellList([bn])
         >>> cell_ls.insert(0, conv)
         >>> cell_ls.append(relu)
-        >>> x = Tensor(np.random.random((1, 3, 4, 4)), dtype=mindspore.float32)
-        >>> # not same as nn.SequentialCell, `cell_ls(x)` is not correct
         >>> cell_ls
         CellList<
           (0): Conv2d<input_channels=100, ..., bias_init=None>