Update BaseAuthorizationService.cs

- Remove comment

Author: dtng95

src/Umbraco.Cms.Integrations.SEO.Semrush/Services/BaseAuthorizationService.cs

@@ -9,7 +9,6 @@ public class BaseAuthorizationService
             "&response_type=code" +
             "&scope={3}";
 
-        // Using a static HttpClient (see: https://www.aspnetmonsters.com/2016/08/2016-08-27-httpclientwrong/).
         protected readonly IHttpClientFactory HttpClientFactory;
 
         protected readonly TokenBuilder TokenBuilder;