gotd: drop unneeded strlen() in refname_is_valid()

Thread:: gotd: drop unneeded strlen() in refname_is_valid()

2023-06-14 09:11 Omar Polo:
gotd: drop unneeded strlen() in refname_is_valid()
- 2023-06-14 09:36 Stefan Sperling:
  gotd: drop unneeded strlen() in refname_is_valid()