Remove obsolete code

Author: Tsingis

tests/IntegrationTests/ApplicationFactory.cs

@@ -1,17 +1,7 @@
 using Microsoft.AspNetCore.Mvc.Testing;
-using Xunit;
 
 namespace IntegrationTests;
 
-public sealed class ApplicationFactory : WebApplicationFactory<Program>, IAsyncLifetime
+public sealed class ApplicationFactory : WebApplicationFactory<Program>
 {
-    public ValueTask InitializeAsync()
-    {
-        return ValueTask.CompletedTask;
-    }
-
-    public new async ValueTask DisposeAsync()
-    {
-        await base.DisposeAsync().ConfigureAwait(false);
-    }
 }