Cleanup some unused imports.

comfy/clip_vision.py

-from .utils import load_torch_file, transformers_convert, common_upscale, state_dict_prefix_replace
+from .utils import load_torch_file, transformers_convert, state_dict_prefix_replace
 import os
 import torch
-import contextlib
 import json
 
 import comfy.ops

comfy/conds.py

-import enum
 import torch
 import math
 import comfy.utils

comfy/controlnet.py

 import torch
 import math
 import os
-import contextlib
 import comfy.utils
 import comfy.model_management
 import comfy.model_detection

comfy/diffusers_load.py

-import json
 import os
 
 import comfy.sd

comfy/gligen.py

 import torch
-from torch import nn, einsum
+from torch import nn
 from .ldm.modules.attention import CrossAttention
 from inspect import isfunction
 

comfy/model_base.py

@@ -6,7 +6,6 @@ import comfy.model_management
 import comfy.conds
 import comfy.ops
 from enum import Enum
-import contextlib
 from . import utils
 
 class ModelType(Enum):

comfy/sd.py

 import torch
-import contextlib
-import math
 
 from comfy import model_management
-from .ldm.util import instantiate_from_config
 from .ldm.models.autoencoder import AutoencoderKL, AutoencodingEngine
 import yaml
 

comfy/sd1_clip.py

@@ -6,7 +6,6 @@ import torch
 import traceback
 import zipfile
 from . import model_management
-import contextlib
 import comfy.clip_model
 import json