`PolicyController` was annotated `@PremiumEndpoint` (requires a
Pro-or-higher server license). Policies don't need a server-license
gate:
- On SaaS the server runs in Pro mode, so the check is always satisfied
anyway — it gates nothing in practice.
- Access is already governed by team scoping (#6632) plus the per-user /
guest gates.
So the annotation is dead weight and misleading. This removes it (and
its import) — a 2-line change.
## Verification
- `:proprietary:compileJava` succeeds; spotless clean. No other premium
gate on policy classes.
