Remove shrtm.nu from phishing.txt

[floschliep]

Summary

This removes shrtm.nu from phishing.txt. It's the domain for a URL shortener that I own/maintain. I assume the domain was wrongfully added here due to some criminal abusing the service for a phishing attack. As the service is used by the vast majority of people for legitimate purposes and illegal activity is monitored and taken action on, I don't think the domain should be listed here.

Checklist

• [x] I have verified that I have not modified the following files: - inside the adguard folder - inside the alt-version folder - inside the dnsmasq-version folder - everything.txt