Removed jsyeo's dev gems. Removed unused gems.

![lol](https://lh4.googleusercontent.com/-WDENMs9-9Go/UIpQ8VtoPnI/AAAAAAAAGlw/DlGT87t_eKU/s350/123.gif)
> I do think @jsyeo is probably setting up some sane env for the dev/staging machine, as well as the CI server.

I am setting up a proper env for the team at ESTL but not for other contributors. I've decided to put pry and spring back so that those contributors can have a much sane dev env.