refactor: remove deprecated YAML template files

- Deleted all 'template.yml' files from various blueprints as part of the transition to TOML format.
- Updated the script to delete the 'template.yml' files instead of converting them to 'template.toml'.

blueprints/discord-tickets/template.yml

@@ -1,27 +0,0 @@
-variables:
-  main_domain: ${domain}
-  mysql_password: ${password}
-  mysql_root_password: ${password}
-  mysql_user: tickets
-  mysql_database: tickets
-  encryption_key: ${password:48}
-
-config:
-  domains:
-    - serviceName: tickets-app
-      port: 8169
-      host: ${main_domain}
-
-  env:
-    - TICKETS_HOST=${main_domain}
-    - MYSQL_DATABASE=${mysql_database}
-    - MYSQL_PASSWORD=${mysql_password}
-    - MYSQL_ROOT_PASSWORD=${mysql_root_password}
-    - MYSQL_USER=${mysql_user}
-    - ENCRYPTION_KEY=${encryption_key}
-    - "# Follow the guide at: https://discordtickets.app/self-hosting/installation/docker/#creating-the-discord-application"
-    - DISCORD_SECRET=
-    - DISCORD_TOKEN=
-    - SUPER_USERS=YOUR_DISCORD_USER_ID
-
-  mounts: []