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/slash/template.yml

@@ -1,18 +0,0 @@
-variables:
-  main_domain: ${domain}
-  db_password: ${password}
-  db_user: "slash"
-  db_name: "slash"
-
-config:
-  domains:
-    - serviceName: slash-app
-      port: 5231
-      host: ${main_domain}
-
-  env:
-    DB_USER: ${db_user}
-    DB_PASSWORD: ${db_password}
-    DB_NAME: ${db_name}
-
-  mounts: []