Update README.md

README.md

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 |[HackThis!!](https://www.hackthis.co.uk/)|Test your skills with 50+ hacking levels, covering all aspects of security.|
 |[Hackxor](https://hackxor.net/)|Hackxor is a web app hacking game where players must locate and exploit vulnerabilities to progress through the story. Think WebGoat but with a plot and a focus on realism&difficulty. Contains XSS, CSRF, SQLi, ReDoS, DOR, command injection, etc.|
 |[Holynix](https://sourceforge.net/projects/holynix/files/)|Holynix is a Linux VMware image that was deliberately built to have security holes for the purposes of penetration testing.|
-|[HSCTF3](http://hsctf.com/)|HSCTF is an international online hacking competition designed to educate high schoolers in computer science.|
 |[Information Assurance Support Environment (IASE)](https://public.cyber.mil/cyber-training/training-catalog/?_training_types=3-training-student-self-paced)|Great site with Cybersecurity Awareness Training, Cybersecurity Training for IT Managers, Cybersecurity Training for Cybersecurity Professionals, Cybersecurity Technical Training, NetOps Training, Cyber Law Awareness, and FSO Tools Training available online.|
 |[Java Vulnerable Lab](https://github.com/CSPF-Founder/JavaVulnerableLab)|Vulnerable Java based Web Application.|
 |[Juice Shop](https://github.com/bkimminich/juice-shop)|OWASP Juice Shop is an intentionally insecure web app for security training written entirely in Javascript which encompasses the entire OWASP Top Ten and other severe security flaws.|