remove newaxis

[BastienLacave]

Write CTLearn_telescopes in a column instead of in a row (bug), this divides the file size by 1000. Anly for predict LST1 tool

[TjarkMiener]

Thanks @BastienLacave! is_valid is a simple boolean, but ..._telescopes should be an array of boolean, where each entry has a boolean array of length n_tels. Here n_tels is 1 since we only have LST-1. I think the problem is that [np.newaxis] is makinig the dimension over the wrong axis. Can you please check?