The Galaxy reports webapp is gone

[bgruening]

We should remove any mention for the Galaxy reports webapp from GTN, as we have removed the app from the codebase for 26.0.

[hexylena]

#6604 @martenson

[martenson]

@bgruening it is in the deprecated section now, it feels fine to leave it there for some time?

[martenson]

that said git-gat and other integrations should be updated to reflect this