Revert "Added throttling options to sample REST service"

This reverts commit 83b397eb8c314c5869ff00d478a4fc6eeee91742.
Revert "Reworked sample REST service performance tests: max perf: N clients = N cores ~12000m/s"

This reverts commit aa66c017102436a29e30e44a9419eab035c3139e.

Conflicts:
	Samples/RestService/SimpleRestClient/Program.cs
	Samples/RestService/SimpleRestClient/SimpleRestClient.csproj