- Do you want to request a feature or report a bug?
I think it's feature
- What is the current behavior?
big size bundle
- If the current behavior is a bug, please provide the steps to reproduce.

- What is the expected behavior?
small size bundle

- Please mention your versions where applicable.

Netlify CMS version:
Browser version:

Node.JS version:
Operating System:

- Please link or paste your config.yml below if applicable.