remove pinned cudnn version and replace with comments

Author: ardenma

pyproject.toml

@@ -14,7 +14,6 @@ dependencies = [
     "torchvision==0.24.1",
     "transformers==4.57.1",
     "qwen-vl-utils==0.0.11",
-    "nvidia-cudnn-cu12==9.16.0.29", # https://github.com/pytorch/pytorch/issues/168167
     "datasets",
     "setuptools",
     "tqdm",