CI: Remove broken actions/upload-artifact@v4 action

After switching from (depreacted) v3 to v4 it was broken and actually
was not doing anything interesting.

Author: erikd

.github/workflows/haskell.yml

@@ -72,12 +72,6 @@ jobs:
         MSYSTEM: MINGW64
       run: cabal test all --enable-tests --test-show-details=direct -j1
 
-    - uses: actions/upload-artifact@v4
-      with:
-        name: Build & test logs
-        path: |
-          dist-newstyle/**/*.log
-
     # - name: Run benchmarks
     #   run: cabal bench all --enable-tests