You can unsubscribe from the mod to remove the downloaded files from your computer.
- Click on the Tools button on the title screen.
- Click the Mods button.
- Click on the mod that you want to remove.
- Click the Unsubscribe button at the bottom of the window.
- When prompted, click Yes to confirm that you want to unsubscribe from the mod.
NOTE: You may need to re-launch your game for some changes to take effect.