Remove SQLCompiler.quote_name_unless_alias monkey patch
Remove SQLCompiler.quote_name_unless_alias monkey patch

Other than a comment in the source, this appears to be undocumented. The
inline comment doesn't make it clear why it's worthwhile.

It's being removed because:

- Is this really useful enough to add a monkey patch for?
- Monkey-patching is a bad idea. At the very least, this kind of thing
  should be opt-in instead an import-time side effect.
- The implementation looks brittle regardless.
- Arcutils shouldn't be a dumping-ground for one-off functionality.

Since removing this makes the models module empty, the models module has
been removed entirely.

PSU-OIT-ARC/django-arcutils,wylee/django-arcutils,wylee/django-arcutils,PSU-OIT-ARC/django-arcutils