Cleanup redundant DownloadProtocol in indexers

src/NzbDrone.Core/Indexers/TorrentIndexerBase.cs

@@ -9,6 +9,8 @@ namespace NzbDrone.Core.Indexers
     public abstract class TorrentIndexerBase<TSettings> : HttpIndexerBase<TSettings>
         where TSettings : IIndexerSettings, new()
     {
+        public override DownloadProtocol Protocol => DownloadProtocol.Torrent;
+
         protected TorrentIndexerBase(IIndexerHttpClient httpClient, IEventAggregator eventAggregator, IIndexerStatusService indexerStatusService, IConfigService configService, Logger logger)
             : base(httpClient, eventAggregator, indexerStatusService, configService, logger)
         {