hosts: Remove jenkins0, build0

The Jenkins controller is now hosted in Kubernetes.  Relatedly, jobs
all run in Kubernetes pods, and there is no longer any need for static
agents.

hosts

@@ -47,7 +47,6 @@ vm-hosts
 pyrocufflink-dhcp
 
 [docker]
-build0-amd64.pyrocufflink.blue
 
 [docker:children]
 bitwarden_rs
@@ -73,7 +72,6 @@ logs0.pyrocufflink.blue
 hass2.pyrocufflink.blue
 
 [jenkins-slave]
-build0-amd64.pyrocufflink.blue
 
 [k8s-controller]
 k8s-ctrl0.pyrocufflink.blue
@@ -117,7 +115,6 @@ web0.pyrocufflink.blue
 pxe0.pyrocufflink.blue
 
 [pyrocufflink]
-build0-amd64.pyrocufflink.blue
 burp1.pyrocufflink.blue
 bw0.pyrocufflink.blue
 cloud0.pyrocufflink.blue
@@ -126,7 +123,6 @@ dc2.pyrocufflink.blue
 file0.pyrocufflink.blue
 git0.pyrocufflink.blue
 hass2.pyrocufflink.blue
-jenkins0.pyrocufflink.blue
 k8s-amd64-n0.pyrocufflink.blue
 k8s-amd64-n1.pyrocufflink.blue
 k8s-amd64-n2.pyrocufflink.blue