refactor: remove unused using directives in IEssentialsRoom interface

Author: ndorin

src/PepperDash.Essentials.Core/Room/IEssentialsRoom.cs

@@ -1,11 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using Crestron.SimplSharp;
-
-using PepperDash.Essentials.Core.DeviceTypeInterfaces;
-using PepperDash.Essentials.Room.Config;
+using PepperDash.Essentials.Core.DeviceTypeInterfaces;
 using PepperDash.Essentials.Core.Devices;
 
 using PepperDash.Core;