Update CI

Author: niklasweimann

.github/workflows/main.yml

@@ -15,19 +15,10 @@ jobs:
         uses: actions/checkout@v4
       - name: Build
         run: dotnet build --configuration Release
-      - name: Upload build result
-        uses: actions/upload-artifact@v4
-        with:
-          name: build
-          path: /var/build
   test:
     runs-on: ubuntu-latest
     needs: build
     timeout-minutes: 3
     steps:
-      - name: Download build result
-        uses: actions/download-artifact@v4
-        with:
-          name: build
       - name: Test
         run: dotnet test --configuration Release