Remove unused domain-specific subdirectories from Simbody build tree.
Remove unused domain-specific subdirectories from Simbody build tree.

simbody/simbody,chrisdembia/simbody,scamille/simbody,elkingtonmcb/simbody,elen4/simbody,scamille/simbody,robojukie/simbody,chrisdembia/simbody,simbody/simbody,Gjacquenot/simbody,Gjacquenot/simbody,elen4/simbody,chrisdembia/simbody,elkingtonmcb/simbody,elkingtonmcb/simbody,scamille/simbody,robojukie/simbody,robojukie/simbody,Gjacquenot/simbody