Delete Install .NET SDK 5

.github/workflows/dotnet-desktop.yml

@@ -33,12 +33,6 @@ jobs:
       with:
         fetch-depth: 0
 
-    # Install the .NET Core workload
-    - name: Install .NET Core
-      uses: actions/setup-dotnet@v4
-      with:
-        dotnet-version: 5
-
     # Add  MSBuild to the PATH: https://github.com/microsoft/setup-msbuild
     - name: Setup MSBuild.exe
       uses: microsoft/setup-msbuild@v2