Merge pull request #184 from jacob-hughes/simplify-ci

Remove git --unshallow from CI script

Author: ltratt

.buildbot.sh

@@ -6,10 +6,6 @@ YKSOMV=4d3679fca1139876adccdbd9a27f110b91b229fa
 GRMTOOLSV=7fff436c3659f103eac658e68808990410d2594b
 set -e
 
-# This is needed because Alloy is rebased on top of rustc, and we need enough
-# depth for the bootstrapper to find the correct llvm sha
-git fetch --unshallow
-
 export CARGO_HOME="$(pwd)/.cargo"
 export RUSTUP_HOME="$(pwd)/.rustup"