Fix duplicate `maas:` parameter

Change-Id: I981f21c5e8a0844e5d93b1ce9d45962b286ef687
diff --git a/init.yml b/init.yml
index 980505b..45f1248 100644
--- a/init.yml
+++ b/init.yml
@@ -144,7 +144,6 @@
       XRqg8z44wtlroFTrnR+DgqplsellsrM+xGtZb9VrjFLeP89jzhrBWgE=
       =GLje
       -----END PGP PUBLIC KEY BLOCK-----
-
   aptly:
     server:
       repo:
@@ -481,7 +480,6 @@
           host:
             name: registry.mcp-offline-lab.local
             port: 5000
-
   linux:
     system:
       file:
@@ -525,9 +523,6 @@
   maas:
     mirror:
       enabled: true
-  maas:
-    mirror:
-      enabled: true
       image:
         sections:
           bootloaders: