prevent incorrect default rating

MediaBrowser.Providers/Movies/GenericMovieDbInfo.cs

@@ -199,7 +199,6 @@ namespace MediaBrowser.Providers.Movies
 
                 var ourRelease = releases.FirstOrDefault(c => c.iso_3166_1.Equals(preferredCountryCode, StringComparison.OrdinalIgnoreCase));
                 var usRelease = releases.FirstOrDefault(c => c.iso_3166_1.Equals("US", StringComparison.OrdinalIgnoreCase));
-                var minimunRelease = releases.OrderBy(c => c.release_date).FirstOrDefault();
 
                 if (ourRelease != null)
                 {
@@ -210,10 +209,6 @@ namespace MediaBrowser.Providers.Movies
                 {
                     movie.OfficialRating = usRelease.certification;
                 }
-                else if (minimunRelease != null)
-                {
-                    movie.OfficialRating = minimunRelease.iso_3166_1 + "-" + minimunRelease.certification;
-                }
             }
 
             if (!string.IsNullOrWhiteSpace(movieData.release_date))