raco: delete clang-v1.py

Subsumed by cliblang.py, where the active development is.
Note that we can always recover this file from git history.
remove cliblang.py

Actually, subsumed by clang.py. Again, we can recover from git history
if needed.
Merge pull request #259 from uwescience/delete-unused-code

raco: delete clang-v1.py