diffusers

84cd9e8d - Make sure DDPM and `diffusers` can be used without Transformers (#5668)

Make sure DDPM and `diffusers` can be used without Transformers (#5668) * fix: import bug * fix * fix * fix import utils for lcm * fix: pixart alpha init * Fix --------- Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>