Potentially Unused Function _gvec_to_detector_array

[ZackAttack614]

The function's documentation claims to be identical to gvec_to_xy from the transforms module, but worse. It also doesn't seem to be used in all of hexrd.

Consider deletion.

[psavery]

The scripts in the grainmap directory are near-field scripts maintained by Darren Pagan and Rachel Lim.

I think we should consider moving these scripts to a separate directory (like scripts/grainmap), since these are not really used as a part of the hexrd package. We should also probably ask for their review for deleting anything.

[ZackAttack614]

Since the scripts folder has now been removed, should we consider deleting this from the repo and moving it elsewhere? Happy to include Darren/Rachel as appropriate.

[ZackAttack614]

@darrencpagan Can you advise?