chore: lift the run-queue knip ignore

The class the ignore covered is deleted at this level, so the merged result
carries no dead-code exemption.

Author: matt-aitken

knip.json

@@ -27,9 +27,6 @@
       ],
       "ignoreDependencies": ["@sentry/cli", "assert", "util"]
     },
-    "internal-packages/run-engine": {
-      "ignore": ["src/run-queue/index.ts"]
-    },
     "internal-packages/dashboard-agent": {
       "entry": ["trigger.config.ts", "src/investigation-sweep.ts", "src/maintenance.ts"],
       "ignoreBinaries": ["rg"]