Remove unused actions

[Bo98]

I've been working on a complete testing overhaul here, but there's some actions that feel like wasted effort to try include in that overhaul.

Open for discussion - happy to do a deprecation path for some of these, however that is supposed to look like. Only cancel-previous-runs was previously marked "deprecated".

For all, I did best effort searches for existing usage, but this is limited to repositories indexed by GitHub and also does not include private or enterprise repositories. If we do end up removing anything anyone uses, I'd invite them to let us know and we can figure something out. Each are individual commits that can be independently reverted.

• cancel-previous-runs: remove
  • Deprecated since July 2021
  • No known external usage: https://github.com/search?q=+%22Homebrew%2Factions%2Fcancel-previous-runs%22+NOT+is%3Afork&type=code
• count-bottles: fold into post-build
  • Note that post-build is not recommended for external usage and would suggest migrating that further soon.
  • No known external usage: https://github.com/search?q=+%22Homebrew%2Factions%2Fcount-bottles%22+NOT+is%3Afork&type=code
• download-artifact: remove
  • Obsolete since actions/download-artifact@v4, but we already stopped using it well before then
  • Only known external usage is commented out: https://github.com/search?q=+%22Homebrew%2Factions%2Fdownload-artifact%22+NOT+is%3Afork&type=code
• gh-try-download: remove
  • We stopped using this today: workflows: use artifact v4 for event_payload homebrew-core#167347
  • Obsolete since actions/download-artifact@v4
  • External usage appears to be dormant homebrew-core hard forks: https://github.com/search?q=+%22Homebrew%2Factions%2Fgh-try-download%22+NOT+is%3Afork&type=code
• post-review: remove
  • We didn't even use this in Homebrew/brew's recently removed bot approval
  • No external usage beyond a demonstration of how to exploit it: https://github.com/search?q=+%22Homebrew%2Factions%2Fpost-review%22+NOT+is%3Afork&type=code
• review-cask-pr: remove
  • No external usage beyond a demonstration of how to exploit it: https://github.com/search?q=+%22Homebrew%2Factions%2Freview-cask-pr%22+NOT+is%3Afork&type=code

test

[github-actions]

body

[MikeMcQuaid]

Agreed on removal and thanks for cleanup. 👍🏻 to just merge this and we can consider re-adding and deprecating individual items if there are complaints.

[chenrui333]

this caused some issue

Error: Homebrew/actions/master/post-build/action.yml: (Line: 60, Col: 57, Idx: 1765) - (Line: 60, Col: 78, Idx: 1786): While parsing a block mapping, did not find expected key.
Error: System.ArgumentException: Unexpected type '' encountered while reading 'action manifest root'. The type 'MappingToken' was expected.
   at GitHub.DistributedTask.ObjectTemplating.Tokens.TemplateTokenExtensions.AssertMapping(TemplateToken value, String objectDescription)
   at GitHub.Runner.Worker.ActionManifestManager.Load(IExecutionContext executionContext, String manifestFile)
Error: Failed to load Homebrew/actions/master/post-build/action.yml

https://github.com/Homebrew/homebrew-core/actions/runs/8577932249/job/23511213925?pr=168176