skawarePackages: remove updateScript from man-pages (#415890)
nix-update currently mishandles sourcehut releases and
skawarePackages.buildManPages always sources from sourcehut.
This partially reverts commit 8a9b7acd7390 (skawarePackages: add passthru.updateScript, 2025-05-27).
authored by Daniel Sampliner and committed by GitHub 9d2765dc fb9eaf48