Remove max runtime

MediaBrowser.Providers/Trickplay/TrickplayImagesTask.cs

@@ -63,8 +63,7 @@ namespace MediaBrowser.Providers.Trickplay
                 new TaskTriggerInfo
                 {
                     Type = TaskTriggerInfo.TriggerDaily,
-                    TimeOfDayTicks = TimeSpan.FromHours(3).Ticks,
-                    MaxRuntimeTicks = TimeSpan.FromHours(5).Ticks
+                    TimeOfDayTicks = TimeSpan.FromHours(3).Ticks
                 }
             };
         }