message: Remove `DefaultSasVersion`
  because each service has its own version
  closes
diff: @@ -18,7 +18,6 @@ namespace Azure { namespace Storage { namespace _internal {
  constexpr static const char* HttpHeaderContentType = "content-type";
  constexpr static const char* HttpHeaderContentLength = "content-length";
  constexpr static const char* HttpHeaderContentRange = "content-range";
  - constexpr static const char* DefaultSasVersion = "2020-02-10";
  constexpr int ReliableStreamRetryCount = 3;
  }}} // namespace Azure::Storage::_internal
  