Cleaned up usings

src/Discord.Net.Core/Entities/Guilds/IGuild.cs

@@ -1,8 +1,8 @@
-using System;
+using Discord.API.Rest;
+using Discord.Audio;
+using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
-using Discord.API.Rest;
-using Discord.Audio;
 
 namespace Discord
 {

src/Discord.Net.Core/Entities/Roles/Color.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Diagnostics;
 
-namespace Discord
+namespace Discord
 {
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
     public struct Color

src/Discord.Net.Core/Entities/Users/IGroupUser.cs

@@ -1,6 +1,4 @@
-using System.Threading.Tasks;
-
-namespace Discord
+namespace Discord
 {
     public interface IGroupUser : IUser, IVoiceState
     {

src/Discord.Net.Core/Entities/Users/IGuildUser.cs

@@ -1,7 +1,7 @@
-using System;
+using Discord.API.Rest;
+using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
-using Discord.API.Rest;
 
 namespace Discord
 {