build: remove fetch-mock

Author: wolfy1339

package-lock.json

@@ -35,7 +35,6 @@
     "@types/node": "^22.0.0",
     "@vitest/coverage-v8": "^3.0.0",
     "esbuild": "^0.24.0",
-    "fetch-mock": "^12.0.0",
     "github-openapi-graphql-query": "^4.0.0",
     "glob": "^11.0.0",
     "npm-run-all2": "^7.0.0",