Merge pull request #628 from IntersectMBO/erikd/ghs-restore-key

GHA: Remove uneeded and unused key value

.github/workflows/haskell.yml

@@ -91,9 +91,6 @@ jobs:
           ${{ steps.setup-haskell.outputs.cabal-store }}
           dist-newstyle
         key: cache-${{ env.CABAL_CACHE_VERSION }}-${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('dependencies.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-ghc-${{ env.GHC_VERSION }}-cabal-${{ env.CABAL_VERSION }}-
-          cache-${{ env.CABAL_CACHE_VERSION }}-${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('dependencies.txt') }}
 
     # Now we install the dependencies. If the cache was found and restored in the previous step,
     # this should be a no-op, but if the cache key was not found we need to build stuff so we can
@@ -102,6 +99,7 @@ jobs:
       run: cabal build all --enable-tests --only-dependencies -j --ghc-option=-j4
 
     # Always store the cabal cache.
+    # This can fail (benign failure) if there is already a hash at that key.
     - name: Cache Cabal store
       uses: actions/cache/save@v4
       with: