Removed unused parameters

src/Discord.Net/Extensions/DiscordClientExtensions.cs

@@ -11,12 +11,12 @@ namespace Discord
 
         public static async Task<IDMChannel> GetDMChannelAsync(this IDiscordClient client, ulong id)
             => await client.GetPrivateChannelAsync(id).ConfigureAwait(false) as IDMChannel;
-        public static async Task<IEnumerable<IDMChannel>> GetDMChannelsAsync(this IDiscordClient client, ulong id)
+        public static async Task<IEnumerable<IDMChannel>> GetDMChannelsAsync(this IDiscordClient client)
             => (await client.GetPrivateChannelsAsync().ConfigureAwait(false)).Select(x => x as IDMChannel).Where(x => x != null);
 
         public static async Task<IGroupChannel> GetGroupChannelAsync(this IDiscordClient client, ulong id)
             => await client.GetPrivateChannelAsync(id).ConfigureAwait(false) as IGroupChannel;
-        public static async Task<IEnumerable<IGroupChannel>> GetGroupChannelsAsync(this IDiscordClient client, ulong id)
+        public static async Task<IEnumerable<IGroupChannel>> GetGroupChannelsAsync(this IDiscordClient client)
             => (await client.GetPrivateChannelsAsync().ConfigureAwait(false)).Select(x => x as IGroupChannel).Where(x => x != null);
 
         public static async Task<IVoiceRegion> GetOptimalVoiceRegionAsync(this IDiscordClient discord)

src/Discord.Net/WebSocket/Extensions/DiscordClientExtensions.cs

@@ -10,12 +10,12 @@ namespace Discord.WebSocket
 
         public static IDMChannel GetDMChannel(this DiscordSocketClient client, ulong id)
             => client.GetPrivateChannelAsync(id) as IDMChannel;
-        public static IEnumerable<IDMChannel> GetDMChannels(this DiscordSocketClient client, ulong id)
+        public static IEnumerable<IDMChannel> GetDMChannels(this DiscordSocketClient client)
             => client.GetPrivateChannels().Select(x => x as IDMChannel).Where(x => x != null);
 
         public static IGroupChannel GetGroupChannel(this DiscordSocketClient client, ulong id)
             => client.GetPrivateChannel(id) as IGroupChannel;
-        public static IEnumerable<IGroupChannel> GetGroupChannels(this DiscordSocketClient client, ulong id)
+        public static IEnumerable<IGroupChannel> GetGroupChannels(this DiscordSocketClient client)
             => client.GetPrivateChannels().Select(x => x as IGroupChannel).Where(x => x != null);
         
         public static IVoiceRegion GetVoiceRegion(this DiscordSocketClient client, string id)