Removed restricted key from module data after upgrade to 2.3

Hi,
after upgrade from 2.2.1 to 2.3 i have warning:

[WARNING]: Removed restricted key from module data: ansible_lxc_221592 […] rest of interface data […]

where lxc_221592 is name of lxc container interface. I can’t find any information in changelog nor documentation about it. It’s a bug or feature?