Remove other websites.

README.md

     - [Infrastructure](#infrastructure)
 - [Resources](#resources)
     - [PHP Websites](#php-websites)
-    - [Other Websites](#other-websites)
     - [PHP Books](#php-books)
     - [PHP Videos](#php-videos)
     - [PHP Podcasts](#php-podcasts)
 * [Seven PHP](https://7php.com/) - A website that interviews members of the PHP community.
 * [PHP Annotated Monthly](https://blog.jetbrains.com/phpstorm/category/php-annotated-monthly/) - A monthly digest of PHP news.
 
-### Other Websites
-*Useful websites related to web development.*
-
-* [Atlassian Git Tutorials](https://www.atlassian.com/git) - A series of Git tutorials.
-* [Learning Linux](https://linuxjourney.com/) - A website for learning Linux.
-* [Semantic Versioning](https://semver.org/) - A website explaining semantic versioning.
-* [Servers for Hackers](https://serversforhackers.com/) - A newsletter about server management.
-* [The Open Web Application Security Project (OWASP)](https://owasp.org/) - An open software security community.
-
 ### PHP Books
 *Fantastic PHP-related books.*