[Fixed] Vindicators Without weapons hold their arm up in an inappropriate way

The bug

Replacing a vindicators mainhand with air will cause them to hold their arm up ressembling a salute.

Steps to reproduce:

1. Spawn/Find a vindicator.

2. Use this commmand:

/replaceitem entity @e[type=vindicator] slot.weapon.mainhand 1 air

3. Provoke it

→ The vindicator holds its arm up in an inappropriate way.