This wouldn't be a bad idea. But would you want this to also remove the NTRs from https://www.animecharactersdatabase.com/maiwaifu.php?ntr or just what you see on the list of yours?
Uhh, no. This is more of a private thing. This is for people's own sake of having a clean slate in their own records. So it should be only our own lists.
That link you provided is more of a public record, so therefore it kind of provides a public service to let people know which chars are most fought for.
Although on that note, it wouldn't hurt to have that list automatically drop out certain chars that haven't been fought over for in a very long time, specifically the very lowest claimed chars. That way people won't have to go through tons and tons of pages of previously fought over chars in that list. Especially if this site plans to grow, and more and more popular animes come out with more and more highly desired chars, then that list's pages are gonna grow fast and uncontrolled. Unless that feature already has a limit of how much chars it can show, then that's no problem. If not, then that might be suggestion for that. Because we don't need 100s or even 1000s of pages of chars, that includes chars that were only fought over for once or twice and then never again or weren't fought over for in for months or even years.
But anyways back to the main topic, no. It's a personal thing. So it shouldn't affect that page. Otherwise it'd be too broken (in more ways than one), if people were able to erase all tracks/signs of the waifu being fought for, in everyone's eyes.... And I'm sure that would be a scripting hell for Rei-san to type out and debug later on.... We don't need to add more on his plate as is lol.
[ Edited Jan 26, 2018 ]