Revert "setup: Add heroku-toolbelt" due to heroku/legacy-cli#1211

This reverts commit 37fadd9.

setup.yml

@@ -91,16 +91,12 @@
     - name: Add docker repository key
       apt_key: id=36A1D7869245C8950F966E92D8576A8BA88D21E9 keyserver=hkp://keyserver.ubuntu.com:80
 
-    - name: Add heroku repository key
-      apt_key: url=https://toolbelt.heroku.com/apt/release.key
-
     - name: Add extra repositories
       apt_repository: repo="{{item}}"
       with_items:
         - 'deb http://archive.canonical.com/ {{ansible_lsb.codename}} partner' # skype, etc
         - 'ppa:hvr/ghc' # haskell
         - 'deb https://get.docker.io/ubuntu docker main'
-        - 'deb http://toolbelt.heroku.com/ubuntu ./'
 
     - name: Install other software
       apt: name={{item}}
@@ -134,7 +130,6 @@
         - texlive-latex-extra
         - texlive-fonts-recommended
         - lxc-docker
-        - heroku-toolbelt
 
     - name: Install KeepassHttp plugin # needed for PassIFox
       get_url: url="https://passifox.appspot.com/KeePassHttp.plgx" dest=/usr/lib/keepass2 sha256sum={{keepass_http.sha256}}