[pt] remove unused repo gpgkey for yum repo

Author: Arhell

content/pt-br/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md

@@ -166,7 +166,7 @@ baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
 enabled=1
 gpgcheck=1
 repo_gpgcheck=1
-gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
+gpgkey=https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
 exclude=kubelet kubeadm kubectl
 EOF