build(deps-dev): remove unused del-cli

del-cli is not referenced anywhere and pulls in the unpatched braces advisory GHSA-vfj7-8cjw-p6xm via fast-glob.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -85,7 +85,6 @@
     "@typescript-eslint/eslint-plugin": "8.71.1",
     "@typescript-eslint/parser": "8.71.1",
     "angular-eslint": "22.5.0",
-    "del-cli": "^7.0.0",
     "esbuild": "^0.28.0",
     "eslint": "^9.39.4",
     "eslint-import-resolver-typescript": "^4.4.5",