Added IDisposable to DiscordClients, removed unused property

src/Discord.Net/API/DiscordAPIClient.cs

@@ -99,6 +99,8 @@ namespace Discord.API
                 {
                     _loginCancelToken?.Dispose();
                     _connectCancelToken?.Dispose();
+                    (_restClient as IDisposable)?.Dispose();
+                    (_gatewayClient as IDisposable)?.Dispose();
                 }
                 _isDisposed = true;
             }

src/Discord.Net/DiscordClient.cs

@@ -1,5 +1,4 @@
 using Discord.API.Rest;
-using Discord.Extensions;
 using Discord.Logging;
 using Discord.Net;
 using Discord.Net.Queue;
@@ -56,7 +55,7 @@ namespace Discord
                 if (bucket == null && id != null)
                     await _queueLogger.WarningAsync($"Unknown rate limit bucket \"{id ?? "null"}\"").ConfigureAwait(false);
             };
-            
+
             ApiClient = new API.DiscordApiClient(config.RestClientProvider, (config as DiscordSocketConfig)?.WebSocketProvider, requestQueue: _requestQueue);
             ApiClient.SentRequest += async (method, endpoint, millis) => await _restLogger.VerboseAsync($"{method} {endpoint}: {millis} ms").ConfigureAwait(false);
         }
@@ -256,10 +255,11 @@ namespace Discord
             return models.Select(x => new VoiceRegion(x)).Where(x => x.Id == id).FirstOrDefault();
         }
 
-        internal void Dispose(bool disposing)
+        internal virtual void Dispose(bool disposing)
         {
             if (!_isDisposed)
                 _isDisposed = true;
+            ApiClient.Dispose();
         }
         /// <inheritdoc />
         public void Dispose() => Dispose(true);

src/Discord.Net/DiscordSocketClient.cs

@@ -47,8 +47,7 @@ namespace Discord
         public ConnectionState ConnectionState { get; private set; }
         /// <summary> Gets the estimated round-trip latency, in milliseconds, to the gateway server. </summary>
         public int Latency { get; private set; }
-
+        
-        internal IWebSocketClient GatewaySocket { get; private set; }
         internal int MessageCacheSize { get; private set; }
         internal DataStore DataStore { get; private set; }
 
@@ -97,7 +96,6 @@ namespace Discord
                 else
                     await _gatewayLogger.WarningAsync($"Connection Closed").ConfigureAwait(false);
             };
-            GatewaySocket = config.WebSocketProvider();
 
             _voiceRegions = ImmutableDictionary.Create<string, VoiceRegion>();
             _largeGuilds = new ConcurrentQueue<ulong>();

src/Discord.Net/IDiscordClient.cs

@@ -1,4 +1,5 @@
 using Discord.API;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Threading.Tasks;
@@ -6,7 +7,7 @@ using System.Threading.Tasks;
 namespace Discord
 {
     //TODO: Add docstrings
-    public interface IDiscordClient
+    public interface IDiscordClient : IDisposable
     {
         LoginState LoginState { get; }
         ConnectionState ConnectionState { get; }