It's mostly a filler word. I've read through each use of it in the code
base and did minor rephrasings when "simply" carried some meaning. The
overwhelming majority of cases, removing it improved the text
significantly. Inspired by #20793.
Closes#20822
Works better if we later introduce another way to do the asynch RR
resolves (together with the threaded resolver) that does not use c-ares.
Closes#16090
