Remove more unnecessary usings

src/Discord.Net.WebSocket/DiscordSocketApiClient.cs

@@ -3,7 +3,6 @@ using Discord.API.Gateway;
 using Discord.Net.Queue;
 using Discord.Net.Rest;
 using Discord.Net.WebSockets;
-using Discord.Rest;
 using Discord.WebSocket;
 using Newtonsoft.Json;
 using System;

src/Discord.Net.WebSocket/DiscordSocketClient.cs

@@ -2,7 +2,6 @@ using Discord.API;
 using Discord.API.Gateway;
 using Discord.Logging;
 using Discord.Net.Converters;
-using Discord.Net.Queue;
 using Discord.Net.Udp;
 using Discord.Net.WebSockets;
 using Discord.Rest;