ci: drop check:bench step

Compiling benches adds ~minutes per CI run for a gate that only
verifies they still build. We run benches locally when tuning hot
paths; the compile check isn't worth the wall-clock.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: jaredLunde

.github/workflows/ci.yml

@@ -33,8 +33,6 @@ jobs:
         run: mise run build:ts
       - name: test:integration:ts
         run: mise run test:integration:ts
-      - name: check:bench
-        run: cargo bench --no-run
   generate-check:
     name: generated files up-to-date
     runs-on: ubuntu-latest