Fix import packaging

Now using:

try:
    import packaging
except ImportError:
    from pkg_resources import packaging

long_clip_model/longclip.py

@@ -3,7 +3,6 @@ import os
 import urllib
 import warnings
 from typing import Any, Union, List
-from pkg_resources import packaging
 from torch import nn
 import torch
 from PIL import Image
@@ -14,6 +13,11 @@ from safetensors.torch import load_file
 from .model_longclip import build_model
 from .simple_tokenizer import SimpleTokenizer as _Tokenizer
 
+try:
+    import packaging
+except ImportError:
+    from pkg_resources import packaging
+
 try:
     from torchvision.transforms import InterpolationMode
     BICUBIC = InterpolationMode.BICUBIC