Remove recaptcha on signup

[goto-bus-stop]

I don't want to make users train Google's self driving cars. Also it screws VPN users so it takes like 5 attempts. +, the fewer third party services we rely on the better…

It might be fine to just remove it but perhaps there is a decent open source are-you-human check too.

[pledi]

https://github.com/omarroth/invidious is using a clock where you need to type the time in as captcha 🤔