what is dhcpv6-client service in firewalld, and can i safely remove it?

In a CentOS 7 server, I type in firewall-cmd --list-all, and it gives me the following:

public (default, active)
  interfaces: enp3s0
  sources: 
  services: dhcpv6-client https ssh
  ports: 
  masquerade: no
  forward-ports: 
  icmp-blocks: 
  rich rules:

What is the dhcpv6-client service? What does it do? And what are the implications of removing it?

I read the wikipedia page for dhcpv6, but it does not tell me specifically what this service on CentOS 7 Firewalld does.

This server is accessible via https and email via mydomain.com, but it is a private server that can only be accessed via https by a list of known ip addresses. In addition, this server can receive email from a list of known email addresses. Is the dhcpv6-client service required to reconcile the domain addresses from the known ip https requests and for exchanging the email with known email addresses?