Remove ucberkeley_cas so it can be made a subtree in shallow working copy
Squashed 'profiles/openberkeley/modules/ucb/ucberkeley_cas/' content from commit 48cfd57

git-subtree-dir: profiles/openberkeley/modules/ucb/ucberkeley_cas
git-subtree-split: 48cfd579ab2980978de37bfd9e6ad457c610f5f2
Merge commit '10fa7d6776668723e8c501cf7517f24013098f8b' as 'profiles/openberkeley/modules/ucb/ucberkeley_cas'