disable rule that requires comments in two image providers for now

Emby.Server.Implementations/Images/ArtistImageProvider.cs

@@ -1,3 +1,5 @@
+#pragma warning disable CS1591
+
 using System;
 using System.Collections.Generic;
 using System.Linq;

Emby.Server.Implementations/Images/GenreImageProvider.cs

@@ -1,7 +1,6 @@
-using System;
+#pragma warning disable CS1591
+
 using System.Collections.Generic;
-using System.Linq;
-using Emby.Server.Implementations.Images;
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Dto;
@@ -10,7 +9,6 @@ using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Entities.Movies;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
-using MediaBrowser.Controller.Playlists;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.IO;