[cfid-598] remove small uaa.yml from war file

All the entries from the uaa.yml have been moved into inline XML.  The file
is still there with a comment to say how to override it.  The main problem
that we might anticipate is that there is no longer an admin client in the
bootstrap except in the default profile.  Most of our users seem to want to
put the admin client in ther custom uaa.yml anyway, so that's probably not
such a problem.

[Fixes #44222845]