fix(traefik/honcho): drop {{ ansible_managed }} — file is rsync-raw

boilerplates/traefik/dynamic/ files are rsynced verbatim to lightning-lane,
not rendered through Jinja first. Traefik also processes Go-style
{{ }} templates, so a leftover {{ ansible_managed }} comment line caused
Traefik to reject the entire file with:

  ERR /etc/traefik/dynamic/honcho.yml: template: :1: function
  "ansible_managed" not defined

Other dynamic configs in this directory deliberately omit the marker;
matching that convention.

boilerplates/traefik/dynamic/honcho.yml

@@ -1,4 +1,3 @@
-# {{ ansible_managed }}
 # Traefik dynamic config for Honcho on lincoln.
 # Routes hall-of-presidents.local.mk-labs.cloud -> lincoln:8000.
 #