Remove outdated comments HostingApplicationDiagnostics (#41778)

Author: halter73

src/Hosting/Hosting/src/Internal/HostingApplicationDiagnostics.cs

@@ -326,12 +326,12 @@ private static void RecordRequestStartEventLog(HttpContext httpContext)
         Activity? activity = null;
         if (_activitySource.HasListeners())
         {
-            if (ActivityContext.TryParse(requestId, traceState, true, out ActivityContext context))
+            if (ActivityContext.TryParse(requestId, traceState, isRemote: true, out ActivityContext context))
             {
-                // The requestId used W3C ID format. Unfortunately the ActivitySource.CreateActivity overload that
-                // takes a string ID sets ActivityContext.IsRemote = false when it parses the string internally.
-                // We work around that by using the ActivityContext ID overload and setting ActivityContext.IsRemote
-                // to true after parsing it.
+                // The requestId used the W3C ID format. Unfortunately, the ActivitySource.CreateActivity overload that
+                // takes a string parentId never sets HasRemoteParent to true. We work around that by calling the
+                // ActivityContext overload instead which sets HasRemoteParent to parentContext.IsRemote.
+                // https://github.com/dotnet/aspnetcore/pull/41568#discussion_r868733305
                 activity = _activitySource.CreateActivity(ActivityName, ActivityKind.Server, context);
             }
             else