Fix refactoring and remove string.IsNullOrEmpty for AbsolutePath, because it's always '/'.

Author: gvkries

src/OrchardCore/OrchardCore/Modules/ModularBackgroundService.cs

@@ -443,7 +443,7 @@ private static void SetBaseUrl(HttpContext context, string baseUrl)
 
         // Set the PathBase only if it's not just "/". Otherwise, the original path base is kept, which may
         // contain the RequestUrlPrefix if any.
-        if (!string.IsNullOrEmpty(uri.AbsolutePath) && uri.AbsolutePath != "/")
+        if (uri.AbsolutePath != "/")
         {
             context.Request.PathBase = uri.AbsolutePath;
         }
@@ -453,5 +453,4 @@ private static void SetBaseUrl(HttpContext context, string baseUrl)
             context.Request.QueryString = new QueryString(uri.Query);
         }
     }
-    }
 }