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/erpnext/template.yml

@@ -1,27 +0,0 @@
-variables:
-  main_domain: ${domain}
-  db_root_password: ${password:32}
-  admin_password: ${password:32}
-
-config:
-  domains:
-    - serviceName: frontend
-      port: 8080
-      host: ${main_domain}
-
-  env:
-    - SITE_NAME=${main_domain}
-    - ADMIN_PASSWORD=${admin_password}
-    - DB_ROOT_PASSWORD=${db_root_password}
-    - MIGRATE=1
-    - ENABLE_DB=1
-    - DB_HOST=db
-    - CREATE_SITE=1
-    - CONFIGURE=1
-    - REGENERATE_APPS_TXT=1
-    - INSTALL_APP_ARGS=--install-app erpnext
-    - IMAGE_NAME=docker.io/frappe/erpnext
-    - VERSION=version-15
-    - FRAPPE_SITE_NAME_HEADER=
-
-  mounts: []