Removed redundant casts and comparisons from PutHttpStatusCode (#515)
Removed redundant casts and comparisons from PutHttpStatusCode (#515)

* Removed redundant casts

* Setting status to Unknown by default

Co-authored-by: Sergey Kanzhelev <dd2a78e617335ac05535a01af404ce3eb19c30fd@live.com>

open-telemetry/opentelemetry-dotnet,open-telemetry/opentelemetry-dotnet,open-telemetry/opentelemetry-dotnet