Switch back to using NuGet.org for all packages since 1.1.1 has released

test/Dockerfile.linux.publish

@@ -1,3 +1,3 @@
 FROM {image}
 
-RUN dotnet restore -r debian.8-x64 {optionalRestoreParams}
+RUN dotnet restore -r debian.8-x64

test/run-test.ps1

@@ -87,15 +87,10 @@ Get-ChildItem -Path $repoRoot -Recurse -Filter Dockerfile |
 
             if ($platform -eq "linux") {
                 $selfContainedImage = "self-contained-build-${buildImage}"
-                $optionalRestoreParams = ""
-                if ($sdkTag -like "*1.1-sdk") {
-                    # Temporary workaround until 1.1.1 packages are released on NuGet.org
-                    $optionalRestoreParams = "-s https://dotnet.myget.org/F/dotnet-core/api/v3/index.json -s https://api.nuget.org/v3/index.json"
-                }
 
                 Write-Host "----- Creating publish-image for self-contained app built on $fullSdkTag -----"
                 Try {
-                    exec { (Get-Content ${testFilesPath}Dockerfile.linux.publish).Replace("{image}", $buildImage).Replace("{optionalRestoreParams}", $optionalRestoreParams) `
+                    exec { (Get-Content ${testFilesPath}Dockerfile.linux.publish).Replace("{image}", $buildImage) `
                         | docker build $optionalDockerBuildArgs -t $selfContainedImage -
                     }