Update ci.yml

Author: rosenbjerg

.github/workflows/ci.yml

@@ -11,7 +11,5 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: 3.1.101
-    - name: Build with dotnet
-      run: dotnet build
     - name: Test with dotnet
       run: dotnet test