Remove libboost

[bobcheng15]

1. Remove libbost from the list of packages installed in the Dockerfile
2. Updated Lego so now it no longer depends on libboost

[bobcheng15]

@steveri, Gautham reworked the source code of Lego, so it no longer depends on libboost. Therefore, I have removed the installation of libboost from the Dockerfile. Hopefully this addresses the image size issue I introduced in my last PR merge.

[steveri]

Thanks guys!

But oops it looks like all three regression tests failed?
https://buildkite.com/stanford-aha/aha-flow/builds/10704

I will restart them to see if maybe it was a transient error...new attempt is in progress here:
https://buildkite.com/stanford-aha/aha-flow/builds/10705

[bobcheng15]

@steveri sounds good, thanks for catching the regression failure!

[steveri]

The other good news is (assuming we eventually get the CI to pass), it looks as though the docker image size is down to less than 6GB:

% docker images
REPOSITORY               TAG               IMAGE ID       CREATED             SIZE
stanfordaha/garnet       remove_libboost   4683f44eb0a1   About an hour ago   5.67GB
stanfordaha/garnet       latest            64581a7cbc7c   8 hours ago         6.98GB
stanfordaha/garnet       <none>            9bba7e64a05a   42 hours ago        8.14GB
stanfordaha/garnet       <none>            a8ccf33f2faf   2 days ago          8.14GB
stanfordaha/garnet       <none>            2365f0e0ebcf   6 weeks ago         7.41GB

[steveri]

All checks passed.
LGTM.
Thanks very much!