Update commands/unload_command.py

commands/unload_command.py

+import discord 
+from discord.ext import commands
+
+@commands.command(brief="Author command", description="Author command", hidden=True)
+@commands.is_owner()
+async def unload_command(ctx, extension):
+    client.unload_extension(f'commands.{extension}')
+    await ctx.send(f'Unloaded commands.{extension}.')
+
+def setup(client):
+    client.add_command(unload_command)