cloud-init: Remove debug from user-date schema

This is to fix:
    Invalid user-data /var/lib/cloud/instances/nocloud/cloud-config.txt
    Error: Cloud config schema errors: debug: Additional properties are not allowed ('debug' was unexpected)

Signed-off-by: Vladimir Sokolovsky <vlad@nvidia.com>

src/cloud/seed/nocloud-net/user-data

@@ -1,6 +1,4 @@
 #cloud-config
-debug:
-  verbose: true
 write_files:
   - path: /etc/iptables/rules.v4
     permissions: '0644'