I am paying for a pro subscription. I don’t think I’m using ACF anywhere at the moment, but I’m not sure how to tell? I think I used to use it for a slider that I no longer have on my site.
If I try to deactivate the plugin the site does not render, so clearly it’s still being called for something somewhere, but maybe unnecessarily? So, perhaps I could remove it, but I’d like to know for sure what will go away, if anything, and I’d like not to break the site?
I’d start by looking at field groups. Are there any? What are the location rules? Are you using them?
Then I would do a search on all code of the theme (and all plugins except acf if I think a plugin might be using acf) for
(get|the)_(sub_)?field
and then go from there to figure out if what’s being called still exists or is still needed.