CI: remove cache dance and cache

.forgejo/workflows/ci.yml

@@ -42,23 +42,6 @@ jobs:
             type=sha,format=short,prefix={{date 'YYYY.MM.DD'}}-,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
             type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
 
-      - name: Cache .o files for compilation
-        uses: https://code.forgejo.org/actions/cache@v4
-        id: cache
-        with:
-          path: |
-            codegen-cache
-          key: cache-${{ hashFiles('./docker/Dockerfile') }}
-
-      - name: Inject cache into Docker
-        uses: https://github.com/reproducible-containers/buildkit-cache-dance@v3.2.0
-        with:
-          cache-map: |
-            {
-              "codegen-cache": "/root/.cache/crystal"
-            }
-          skip-extraction: ${{ steps.cache.outputs.cache-hit }}
-
       - uses: https://code.forgejo.org/docker/build-push-action@v6
         name: Build images
         with: