Remove ui.js upon author's request

Author: Qianqianye

src/data/en.yml

@@ -869,7 +869,6 @@ libraries:
     p5.capture provides a simple GUI to easily record p5.js animations and output 
     video files in various formats (webm, gif, mp4, png, jpg, and webp).
   p5.input: Adds more key support for p5.js.
-  ui: easy to learn sinple 2d ui library and for creative use.
   p5.web-serial: >-
     A p5.js library for using the Web Serial API to access devices like Arduino, 
     no setup required.