Piglins no longer have a unique helmet model and texture to fit their wider heads

In 1.16 Pre-Release 2, Piglins had a unique helmet model and texture to fit their wider heads.

However, in 1.16 Pre-Release 3, Piglins now uses the same helmet model as players as a result of MC-172110 being resolved through the removal of the Piglin helmet textures instead of creating a new turtle shell texture.