dillon1000/react

[ci] Cleanup run_devtools_e2e_tests

This was only used for build_and_test which has since been migrated to
gh actions and is now therefore unused. Looks like I missed this during
the previous cleanup.

ghstack-source-id: 278443951e1eda4a6186a7bb006e81b0e20f6868
Pull Request resolved: https://github.com/facebook/react/pull/30467