Doco Workflow doesn't require dotnet

Author: Lachee

.github/workflows/documentation.yml

@@ -11,7 +11,6 @@ jobs:
     runs-on: windows-latest # Required by DocFX
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-dotnet@v2
 
       - name: Install DocFX
         run: |