hosts: Remove hard-coded IP addresses

Now that DNS is up and running on the blue network, these hosts no
longer need their IP addresses in the inventory. These were wrong,
anyway.

hosts

@@ -2,8 +2,8 @@
 ansible_python_interpreter=/usr/bin/python3
 
 [pyrocufflink]
-dc0.pyrocufflink.blue	ansible_host=2605:6000:3ccc:fb00::10:1
-dc1.pyrocufflink.blue	ansible_host=2605:6000:3ccc:fb00::9:1
+dc0.pyrocufflink.blue
+dc1.pyrocufflink.blue
 dns0.pyrocufflink.blue
 
 [samba-dc]
@@ -11,7 +11,7 @@ dc0.pyrocufflink.blue
 dc1.pyrocufflink.blue
 
 [pyrocufflink-dns]
-dns0.pyrocufflink.blue	ansible_host=2605:6000:3ccc:fb00::4:1
+dns0.pyrocufflink.blue
 
 [named-server:children]
 pyrocufflink-dns