fix: don't check for useless permission when deleting command messages

this allows for deleting command messages in DMs, where the bot does not have manage messages permissions
and just in general in channels where it doesn't have those permissions as well

PluralKit.Bot/Handlers/ReactionAdded.cs

@@ -135,10 +135,6 @@ namespace PluralKit.Bot
 
         private async ValueTask HandleCommandDeleteReaction(MessageReactionAddEvent evt, CommandMessage msg)
         {
-            // TODO: why does the bot need manage messages if it's deleting its own messages??
-            if (!_bot.PermissionsIn(evt.ChannelId).HasFlag(PermissionSet.ManageMessages))
-                return;
-
             // Can only delete your own message
             if (msg.AuthorId != evt.UserId) 
                 return;