Hey huyaz,
While Arti's answer is technically correct in that you can't actually separate AutoFish and TriggerBot from Wurst, this sounds like a perfect use case for GhostWurst! You'd be able to use AutoFish and TriggerBot without any Wurst logos, buttons, etc. being visible on your screen. You wouldn't even have the "Wurst Client" entry in your mod list, files, or log entries. If you set up keybinds to toggle AutoFish and TriggerBot, you could basically forget that ClickGUI / Navigator exist. So it would be almost as if you had just AutoFish and TriggerBot as a separate mod.
What do you think? Does that solve your problem?