By drumm on
Change record status: 
Published (View all published change records)
Project: 
Drupal.org infrastructure
Issue links: 
https://www.drupal.org/node/3128715
Description: 

Drupal core tar.gz & zip packaging previously included dev dependencies for dev releases. Pre-packaged core releases are not meant to support development. Pre-packaged core dev releases are for spotting packaging issues and are not meant for running any site.

This reduces exposure to development dependencies which may lead to security issues and simplifies Drupal.org packaging.