Do you lose the +2 edit rep if the edited post is subsequently deleted?
It seems a little unfair if this is true, but reputation can evaporate in this way in similar circumstances.
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TL;DR: After testing with this other answer here, I can confirm the reputation gained for suggesting an edit is gone when the post is deleted.
Here are the full steps taken:
In that respect, the behavior is exactly the same as that seen when you get points for a post, then delete that post. The points stick around until your reputation is recalculated.
Editor's note: In the past, there used to be a "Recalculate" button in the Reputation Report page, however it was removed after improving the automated reputation synchronization process.
It's probably worth noting you won't lose your reputation from the suggested edits if the post is 60 or more days old and has a score of 3 or higher. This is similar to authors not losing reputation for upvotes on such a post after it is deleted, as documented in e.g. the FAQ and this blog post. (Source: I just scienced it here - I did trigger a reputation recalculation to be sure.)