Went into GSC for URL removal of / for the https://www.url, http://www.url, and http://www.url versions of a http://url site and it deindexed http://url as well. W.T.F.
Selected answers from the Dumb SEO Questions Facebook & G+ community.
Patty Mantaloons: "Mueller said that a site removal request in one of the domain variations would apply to ALL domain variants. So a site removal request for the http://example.com would also apply to http://www.example.com as well as for the https variations as well."
Steve Gerencser: Don`t - their system for URL removal is pretty stupid and obviously written by Montisorri programmers that haven`t really eve had a real world job.
Patty Mantaloons: I blows my mind. If you can remove individual pages within each GSC view for http/https/www/non-www, you`d think removing / would remove only that version