I hope it's not a duplicate, in which case I apologize in advance, but I couldn't find anything about it, so I'm asking ^^"
When animating a character, you sometimes end up having a lot of animations, some of which, in the end, get cut out.
For security and reference reasons though, you might not want to delete them from the Spine project, while you would gladly avoid to have them in the already long list of Unity assets, to avoid confusion and to save some space with a smaller json file.
It would be great, for example, if there was the option to mark animations to be ignored on export 😃
Also, the same option could be useful for skins, as the beforementioned situation could come up for that as well.
As far ask I know, at the moment the only way of avoiding to export animations/skins is to delete them before exporting... Right? ^^"