return the line lost during the merge

modules/sd_samplers_kdiffusion.py

@@ -2,6 +2,7 @@ import torch
 import inspect
 import k_diffusion.sampling
 from modules import sd_samplers_common, sd_samplers_extra, sd_samplers_cfg_denoiser
+from modules.sd_samplers_cfg_denoiser import CFGDenoiser
 
 from modules.shared import opts
 import modules.shared as shared