Remove leftover mentions of artifacts.yml

Makefile

@@ -71,7 +71,6 @@ analyse-imports : phony
 	find Cabal/src cabal-install/src -type f -name '*.hs' | xargs cabal v2-run --builddir=dist-newstyle-meta --project-file=cabal.project.meta analyse-imports --
 
 # github actions
-github-actions : .github/workflows/artifacts.yml
 github-actions : .github/workflows/quick-jobs.yml
 github-actions : .github/workflows/bootstrap.yml
 github-actions : .github/workflows/linux.yml

README.md

@@ -2,7 +2,6 @@
 
 [![Hackage version](https://img.shields.io/hackage/v/Cabal.svg?label=Hackage)](https://hackage.haskell.org/package/Cabal)
 [![Stackage version](https://www.stackage.org/package/Cabal/badge/lts?label=Stackage)](https://www.stackage.org/package/Cabal)
-[![Artifacts](https://github.com/haskell/cabal/actions/workflows/artifacts.yml/badge.svg?branch=master)](https://github.com/haskell/cabal/actions/workflows/artifacts.yml?query=branch%3Amaster)
 [![Documentation Status](http://readthedocs.org/projects/cabal/badge/?version=latest)](http://cabal.readthedocs.io/en/latest/?badge=latest)
 [![IRC chat](https://img.shields.io/badge/chat-via%20libera-brightgreen.svg)](https://web.libera.chat/#hackage)
 [![Matrix chat](https://img.shields.io/badge/chat-via%20matrix-brightgreen.svg)](https://matrix.to/#/#hackage:libera.chat)