Answer by Brian for How to remove a yum repo GPG key?

Using rpm you can list keys and remove them.

[root@apps2 ~]# rpm -q gpg-pubkey --qf '%{NAME}-%{VERSION}-%{RELEASE}\t%{SUMMARY}\n'gpg-pubkey-f4a80eb5-53a7ff4b    gpg(CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>)gpg-pubkey-352c64e5-52ae6884    gpg(Fedora EPEL (7) <epel@fedoraproject.org>)[root@apps2 ~]# rpm -e gpg-pubkey-352c64e5-52ae6884[root@apps2 ~]# rpm -q gpg-pubkey --qf '%{NAME}-%{VERSION}-%{RELEASE}\t%{SUMMARY}\n'gpg-pubkey-f4a80eb5-53a7ff4b    gpg(CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>)[root@apps2 ~]#