CI security audit finding. These are all inherited NewPipe GitHub workflows,
none functional on Forgejo — the real pipeline is .forgejo/workflows/.
Highest risk: pr-labeler.yml ran on pull_request_target with pull-requests:write
and called a mutable @main third-party action with GITHUB_TOKEN — a textbook
pwn-request on a public repo (base-repo write token, triggerable by any fork PR).
image-minimizer.yml ran arbitrary JS with issues/PR write perms. The rest
(no-response, backport-pr, ci, build-release-apk) are dead + were spamming a red
X on every push. Removing the lot drops third-party supply-chain surface to zero.
Also dropped changed-lines-count-labeler.yml (dead config for the deleted labeler).
