Remove unused duplicate CSS file and import

Co-authored-by: BornToBeRoot <[email protected]>

Author: Copilot

Website/docs/introduction.mdx

@@ -2,8 +2,6 @@
 sidebar_position: 0
 ---
 
-import styles from "./styles.module.css";
-
 # Welcome to NETworkManager
 
 ![NETworkManager Preview](https://github.com/BornToBeRoot/NETworkManager/raw/main/Website/static/img/preview-features.gif?raw=true)