test: simplifying if statement in MyWorkerService

Author: Per Kops

test/Atc.Hosting.Tests/XUnitTestTypes/MyWorkerService.cs

@@ -31,14 +31,9 @@ public MyWorkerService(
     protected override Task OnExceptionAsync(
         Exception exception,
         CancellationToken stoppingToken)
-    {
-        if (exception is MyWorkerException)
-        {
-            throw exception;
-        }
-
-        return Task.CompletedTask;
-    }
+        => exception is MyWorkerException
+            ? throw exception
+            : Task.CompletedTask;
 
     public override Task DoWorkAsync(
         CancellationToken stoppingToken)