Remove more cruft and add the beginnings of a socket middleware

Emby.Server.Implementations/WebSockets/WebSocketManager.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Concurrent;
+using System.Net.WebSockets;
+
+namespace Emby.Server.Implementations.WebSockets
+{
+    public class WebSocketManager
+    {
+        private readonly ConcurrentDictionary<Guid, WebSocket> _activeWebSockets;
+
+        public WebSocketManager()
+        {
+            _activeWebSockets = new ConcurrentDictionary<Guid, WebSocket>();
+        }
+
+        public void AddSocket(WebSocket webSocket)
+        {
+            var guid = Guid.NewGuid();
+            _activeWebSockets.TryAdd(guid, webSocket);
+        }
+    }
+}