`make_all_photoz_bin_combinations_with_cmb` has duplicated correlations (my bad!)

[arthurmloureiro]

Describe the bug
Hi!

I noticed I pushed a bug into this metadata function that calculates the cross-correlation combinations with CMB Lensing by doing both cmb-kappa x galaxies and galaxies x cmb-kappa. I should have removed the second case but forgot:

0216ee3#diff-b5687b19fe19ded8040c675fe0788a1f7b37b0bf9dfe0598e95c0a9cbd9137d5R514-R587

I will push a PR to fix this.

To Reproduce
Use make_all_photoz_bin_combinations_with_cmb and see.

Expected behavior
We should have just one of the combinations (I,J) only instead of (I,J) and (J,I).

Observed behavior
(I,J) and (J,I).

Output
(I,J) only

Configuration:
Master branch and all other releases since CMB Lensing was implemented.

Additional context
I will fix this :)