Remove gemnasium
Remove gemnasium

We have no runtime dependencies now, so I don't think it's very useful.

yui-knk/byebug,webdev1001/byebug,scalp42/byebug,icebreaker/byebug,k0kubun/byebug,ozydingo/byebug,k0kubun/byebug,scalp42/byebug,deivid-rodriguez/byebug,yui-knk/byebug,saisai/byebug,guilherme/byebug,deivid-rodriguez/byebug,k0kubun/byebug,os97673/byebug,webdev1001/byebug,deivid-rodriguez/byebug,icebreaker/byebug,saisai/byebug,ozydingo/byebug,guilherme/byebug,yui-knk/byebug,guilherme/byebug,os97673/byebug