CLN: no need to broadcast axes for ndim<=2 (pytables)
It takes a little bit of work to show, but `self.index_axes` is always length-1 on L4243, which means that nindexes == 1 (the assertion added in the code).

This ensures that the condition `if i > 0 and i < nindexes` on L4239 is is never satisfied, so `bindexes` is unnecessary.