Cleaned up code

PluginManager/Items/Command.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using Discord.WebSocket;
 using PluginManager.Others;
 
@@ -41,4 +42,4 @@ internal class Command
     ///     The prefix that is used for the command
     /// </summary>
     public char PrefixUsed { get; }
-}
+}