Remove all rubies older than given date

rvm_remove_old.sh

#!/bin/bash

DATE=${1:-2012-06-01} # allow passing date via DATE env var

for version in `find $rvm_path/rubies/ -mindepth 1 -maxdepth 1 -type d -not -newermt $DATE | cut -d / -f 7`; do rvm remove $version; done