I was updating my ruby environment and wanted to completely remove the old installation, so I wanted to remove rvm and all references to gems stored with it. It turned out that it is very easy. I needed only run 1 command:

rvm implode

This command was removing directories and executable. The command was also suggesting to remove /etc/rvm and ~/.rvm folders, as well as remove rvm group. But I didn’t found them on my laptop. So that was it for me.