Evokers have redundant place on model for displaying held items

The bug

When casting spells, Evokers display their held items, even though it normally never wields any item, probably because it has model data copied over from the Vindicator, which wields iron axes.

How to reproduce

1. Do

   /summon evoker ~ ~ ~ {HandItems:[{id:*any item id*,Count:1b},{}]}

   2. Force it to cast a spell

   → Notice its held item being revealed