XF 2.1 Disabling Reaction Confirmations

Occasionally I am being asked to confirm a reaction. Screenshot:

Confirm like.png

My users are getting this message as well and they consider it extremely disruptive to their posting experience. None of them think that liking a post is a significant enough event to require confirmation.

I would like to disable this entirely, so that my users can like posts without ever being asked to confirm it. I searched the admin panel and see a template called like_confirm but there's no indication of any setting that might modulate its behavior. It also doesn't seem to even match the text of the screenshot above, so might not even be involved in the issue. Any ideas?
 
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