Remove Broadcast and TeamStatisticsDetails classes

The `Broadcast.cs` and `TeamStatisticsDetails.cs` files have been completely removed. The `Broadcast` class included properties such as `Id`, `Name`, `Type`, `Site`, and `Language`, all annotated with `JsonProperty` attributes for JSON serialization. The `TeamStatisticsDetails` class contained numerous properties related to NHL team statistics, such as `GamesPlayed`, `Wins`, `Losses`, `Points`, `GoalsPerGame`, and others, also annotated with `JsonProperty` attributes.

Author: Afischbacher