refactor: remove per-request logging from `Limiter#check`
refactor: remove per-request logging from Limiter#check
Logging on every rate-limited check was deliberately removed in
!272 (merged) to avoid doubling log volume. The rate_limit_check warn
message added in !271 (merged) reintroduced per-request logging in the
hot path.
Remove the warn call from #check and the associated specs.
Observability for rate limit checks will be added back via:
- Prometheus metrics: gitlab-com/gl-infra/production-engineering#28798 (closed)
- Structured fields in existing per-request logs: gitlab-com/gl-infra/production-engineering#28799