add client.tree.sync for commands

src/bot_core.py

@@ -39,11 +39,9 @@ parser.add_argument('channel_id')
 
 @client.event
 async def on_ready():
+    await client.tree.sync()
     print(f'{client.user} has connected.')
     print(f'we are using the guild {args.guild_id} and channel {args.channel_id}')
-    #guild: discord.Guild = await client.fetch_guild(args.guild_id)
-    #channel: discord.TextChannel = await client.fetch_channel(args.channel_id)
-    #await channel.send("test")
 
 
 @client.tree.command()