I've never used Grindr but I don't think it should be removed
Either way the other person will find out your race, and if they're not into you, you'll get rejected
Why not save yourself the trouble
And I'm sure people that say "I'm not attracted to X race" mean that the people they've come across haven't interested them. There's probably someone out there that would fit the look they're going for, but the chances are slim or something idk