Update msbuild.yml

Don't need anything from NuGet.

Author: idigdoug

.github/workflows/msbuild.yml

@@ -25,10 +25,6 @@ jobs:
     - name: Add MSBuild to PATH
       uses: microsoft/setup-msbuild@v1.0.2
 
-    - name: Restore NuGet packages
-      working-directory: ${{env.GITHUB_WORKSPACE}}
-      run: nuget restore ${{env.SOLUTION_FILE_PATH}}
-
     - name: Build
       working-directory: ${{env.GITHUB_WORKSPACE}}
       # Add additional options to the MSBuild command line here (like platform or verbosity level).