Simplify cibuild script

Author: mtodd

script/cibuild

@@ -1,22 +1,6 @@
 #!/bin/sh -e
 # Usage: script/cibuild
 # CI build script.
-# This is tailored for the janky build machines.
 
-# change into root dir and setup path
-cd $(dirname "$0")/..
-export PATH="$(pwd)/bin:$(pwd)/script:$(pwd)/node_modules/.bin:/usr/share/rbenv/shims:/opt/phantomjs/bin:/usr/share/nvm/0.8.11/bin:$PATH"
-
-# setup Ruby version
-if [ -d /usr/share/rbenv/shims ]; then export PATH=/usr/share/rbenv/shims:$PATH; fi
-export RBENV_VERSION="1.9.3-p231-tcs-github"
-
-# Write commit we're building at
-git log -n 1 || true
-echo
-
-export DISPLAY=:99.0
-
-./script/bootstrap
 ./script/testsuite 4018
 bundle exec rake test