Use ITraktSyncRatingsRemovePost instead of ITraktSyncRatingsPost in TraktSyncModule.RemoveRatingsAsync()

[henrikfroehling]

API Change:

namespace TraktNet.Modules
{
    public class TraktSyncModule : ATraktModule
    {
-        public Task<TraktResponse<ITraktSyncRatingsRemovePostResponse>> RemoveRatingsAsync(ITraktSyncRatingsPost ratingsRemovePost,
+        public Task<TraktResponse<ITraktSyncRatingsRemovePostResponse>> RemoveRatingsAsync(ITraktSyncRatingsRemovePost ratingsRemovePost,
    }
}