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/discourse/template.yml

@@ -1,22 +0,0 @@
-variables:
-  main_domain: ${domain}
-  postgres_password: ${password}
-  redis_password: ${password}
-
-config:
-  domains:
-    - serviceName: discourse-app
-      port: 3000
-      host: ${main_domain}
-
-  env:
-    - DISCOURSE_HOST=${main_domain}
-    - POSTGRES_PASSWORD=${postgres_password}
-    - REDIS_PASSWORD=${redis_password}
-    - # Optional: Configure SMTP for email delivery
-    - # SMTP_HOST=smtp.example.com
-    - # SMTP_PORT=587
-    - # SMTP_USER=your_smtp_user
-    - # SMTP_PASSWORD=your_smtp_password
-
-  mounts: []