You can refer below screenshot where extensions are installed. And remove the extensions that are not required
Also, Libraries extension is inbuilt extension of Illustrator where you can create your own library that is stored on Cloud. I am not sure why would you like to remove this extension. Is there any specific reason for removing this?
You're welcome 🙂
I'd strongly recomend that you don't do that.
Illustrator, like many other Adobe programs, were designed as extensible programs developed over a small core of basic functions. A lot of the "extensions" you're seeing as you peek under the hood are actually native Illustrator tools and functions. Dumping those functions will literally cripple your Illustrator installation, and can potentially make the program unstable.
Please. I strongly recommend you don't do that.
Thanks for your advice.
I will not.