Controlling settings, permissions, and membership within Teams and channels
Hello Gerald Bedard,
If it’s been added as a tab of a channel, you could right-click on it and select “Remove”:
If it’s a bot, find the team to which the channel belongs, then click More (…) options -> Manage team. On the Apps tab, click Uninstall next to the name of the bot you want to remove: Block or remove a bot in Teams (to perform this step, owner permission is necessary)
If you have different scenario, please feel free to contact me.
Best Regards,
Anna