Has the "use old 3d models" config option been removed? Can't find it anywhere.

This was removed in 1.12

After browsing most of the history of the models and the config file, as of 2016, I can't find any config entry that relates to a "Use old 3D Models" or anything similar to that, other than using the "Disable 3D Models" option.

In Project Ozone 2 there was a config Option that said
"If true the original 3D armor models created by Skeletonpunk will be used instead of the current ones
B:"Use the original 3D armor models"=true"