The way I understood the request, it seemed the most transparent to revert the whole commit. Regarding whether the idea must have been proposed by the same person writing the BIP:
We have had only three instances in which BIP drafts came from other people than the ones proposing an idea. One was a misunderstanding (AJ suggesting to Chris to help, while Antoine wasn’t in the loop), the others explicitly said that they won’t pursue their idea and it’s up for grabs. I also added a second line here, that states that the authors’ BIP draft has to have been discussed, which seems more important to me.
-* The idea has been previously proposed by one of the authors to the Bitcoin Development Mailing List and discussed there
+* The idea has been previously proposed to the Bitcoin Development Mailing List and discussed there
* The described idea is on-topic for the repository
+* A draft of the BIP by one of the authors has been previously discussed on the Bitcoin Development Mailing List