Temporarily disable rubinius in CI
Temporarily disable rubinius in CI

It takes much longer than the others and is currently broken

PMArtz92/liquid,ipmobiletech/Shopify-liquid,tdg5/liquid,knu/liquid,illMadeKnight/liquid-1,lastobelus/liquid,bibio/liquid,bluerail/liquid,evulse/liquid,tim-vandecasteele/liquid,vietlq/liquid,howkj1/liquid,locomotivecms/liquid,Shopify/liquid,insales/liquid,ilovezy/liquid,zhangkuaiji/liquid,SOFTPOWER1991/liquid,xiaoliw7/liquid,Wirachmat/liquid,Richardphp/liquid,boobooninja/liquid,mcary/liquid,Tiger66639/liquid,bettyblocks/liquid,mrmanc/liquid