Remove unnecessary TODOs

Category channels do not provide any new information, and the other
I forgot to remove beforehand

src/Discord.Net.Rest/Entities/AuditLogs/DataTypes/ChannelUpdateAuditLogData.cs

@@ -35,7 +35,6 @@ namespace Discord.Rest
             var before = new ChannelInfo(oldName, oldTopic, oldBitrate, oldLimit);
             var after = new ChannelInfo(newName, newTopic, newBitrate, newLimit);
 
-            // TODO: check category channels
             return new ChannelUpdateAuditLogData(entry.TargetId.Value, before, after);
         }
 

src/Discord.Net.Rest/Entities/AuditLogs/DataTypes/MemberUpdateAuditLogData.cs

@@ -17,7 +17,7 @@ namespace Discord.Rest
 
         internal static MemberUpdateAuditLogData Create(BaseDiscordClient discord, Model log, EntryModel entry)
         {
-            var changes = entry.Changes.FirstOrDefault(x => x.ChangedProperty == "nick"); //TODO: only change?
+            var changes = entry.Changes.FirstOrDefault(x => x.ChangedProperty == "nick");
 
             var newNick = changes.NewValue?.ToObject<string>();
             var oldNick = changes.OldValue?.ToObject<string>();