Cleanup of git repo

Hi, Is it possible to do some cleanup of the repo. I noticed the "twoPhasePachuka" tutorial case has historical artefacts that are mainly responsible for this. I reduced the repo size from 1.1G to 300M by issuing the following commands (and then re-added the tutorial case)

git filter-branch --tag-name-filter cat --index-filter 'git rm -rf --cached --ignore-unmatch tutorials/multiphase/MPPICInterFoam/twoPhasePachuka' --prune-empty -f -- --all
rm -rf .git/refs/original/
git reflog expire --expire=now --all
git gc --aggressive --prune=now

Regards Andrew

## Reattaching the author to the issue ticket: @Jackson ##