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/formbricks/template.yml

@@ -1,20 +0,0 @@
-variables:
-  main_domain: ${domain}
-  secret_base: ${base64:64}
-  encryption_key: ${base64:48}
-  cron_secret: ${base64:32}
-
-config:
-  domains:
-    - serviceName: formbricks
-      port: 3000
-      host: ${main_domain}
-
-  env:
-    - WEBAPP_URL=http://${main_domain}
-    - NEXTAUTH_URL=http://${main_domain}
-    - NEXTAUTH_SECRET=${secret_base}
-    - ENCRYPTION_KEY=${encryption_key}
-    - CRON_SECRET=${cron_secret}
-
-  mounts: []