Remove JsonSerializable(MetricsOptions)

This type was needed for validation only.

Author: sbomer

src/Microsoft.Diagnostics.Monitoring.WebApi/MonitorJsonSerializerContext.cs

@@ -25,7 +25,6 @@ namespace Microsoft.Diagnostics.Monitoring.WebApi
     [JsonSerializable(typeof(IEnumerable<ProcessIdentifier>))]
     [JsonSerializable(typeof(IList<ProcessIdentifier>))]
     [JsonSerializable(typeof(LogsConfiguration))]
-    [JsonSerializable(typeof(MetricsOptions))]
     [JsonSerializable(typeof(OperationStatus))]
     [JsonSerializable(typeof(ProcessInfo))]
     [JsonSerializable(typeof(ProblemDetails))]