Diffusion Krita 421cf05f37c1

Revert "Recover forbidding rule for adding masks to the root layer"

Authored by rempt on May 18 2019, 12:36 PM.

Description

Revert "Recover forbidding rule for adding masks to the root layer"

This reverts commit ad3649935d0a2a7c9b6e4f6fecc421c69e53c3ca.

Revert this for now so the builds made during the weekend are not
so very broken.

CCBUG:407375
CCBUG:407665