Remove GPR from Build Pipeline (#132)

#131 non-breaking

Author: tthiery

.github/workflows/build-release.yml

@@ -29,26 +29,6 @@ jobs:
       with:
         name: artifacts
         path: ./artifacts
-  publish-github:
-    runs-on: ubuntu-latest
-    needs: [ build ]
-    env:
-      DOTNET_CLI_TELEMETRY_OPTOUT: 1
-    steps:
-    - uses: actions/checkout@v1
-    - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
-      with:
-        dotnet-version: 3.1.100
-        source-url: https://nuget.pkg.github.com/sharpbrick/index.json
-      env:
-        NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
-    - uses: actions/download-artifact@v1
-      with:
-        name: artifacts
-        path: ./artifacts
-    - name: Upload to GitHub Package Registry
-      run:  dotnet nuget push ./artifacts/**/*.nupkg --skip-duplicate -n true
   publish-nuget:
     if: github.event_name == 'release'
     runs-on: ubuntu-latest