Cleanup - old cookbook regeneration tools (render includes)

[andreibancioiu]

Description of the pull request (what is new / what has changed)

Remove old script for re-generating the JS cookbook.

Did you test the changes locally ?

• [x] yes
• [ ] no

Which category (categories) does this pull request belong to?

• [ ] document new feature
• [ ] update documentation that is not relevant anymore
• [ ] add examples or more information about a component
• [ ] fix grammar issues
• [x] other