scripts/update will only git clean submodules
[#146178937](https://www.pivotaltracker.com/story/show/146178937)
@@ -37,8 +37,6 @@ git submodule foreach --recursive 'git submodule sync; git clean -d --force --fo
# Update submodule content, checkout if necessary
git submodule update --init --recursive --force
-git clean -ffd
-
set +x # stop showing commands
echo "Update complete"
