@mazian I think if you’re bi-wiring (2 sets of speaker cables, one amp) or bi- amping (2 sets of speaker cables, two amps) you’re right, you don’t need jumpers.
That said, I had good luck to my ears replacing my stock brass plates (~$4K pair of speakers) with quality jumpers (one amp, one set of speaker cables plus one set of jumpers). Ymmv.
In short answer to your question, definitely remove the brass plates if you’re bi-wiring or bi-amping.