I have seen several posts on how to remove the qed symbol in a proof, but that affects all proof environments. I would like to know how to remove the qed symbol in a particular proof because I have a proof in another.
Just locally change the meaning of
You can make a new environment for "inner proofs":
which will do the same.
if you're using
(thanks to egreg for providing an example that could be cribbed easily.)