Change record status: 
Project: 
Introduced in branch: 
8.x
Introduced in version: 
8.0-dev
Description: 

This was added but then removed later. Fields can now be set to hidden via the form display configuration.

The following contrib modules provided similar functionality for Drupal 7:

https://drupal.org/project/hidden_widget
https://drupal.org/project/field_extrawidgets
https://drupal.org/project/field_hidden
https://drupal.org/project/hidden_field
https://drupal.org/project/formfilter

Impacts: 
Site builders, administrators, editors
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done