removes nazi jacket sprite from suits.dmi (#6389)

# About the pull request
removes nazi jacket sprite from suits.dmi

# Explain why it's good for the game
1. most modern SS13 codebases have specific stipulations in contributing
not to include nazi iconography or themes; need i point out we probably
best not keep it in the repo either
2. unused anywhere

# Testing Photographs and Procedure

![image](https://github.com/cmss13-devs/cmss13/assets/29965103/829d03b7-e655-4976-90d2-1da66942905e)

# Changelog
:cl:
del: removes the nazi jacket sprite from suits.dmi
/:cl:

Co-authored-by: nefarious <[email protected]>
Co-authored-by: Drathek <[email protected]>