remove cutex dependency (#3422)

Author: zhyncs

docs/backend/speculative_decoding.ipynb

@@ -10,10 +10,6 @@
     "\n",
     "**Note:** Currently, Speculative Decoding in SGLang does not support radix cache.\n",
     "\n",
-    "To run the following tests or benchmarks, you also need to install [**cutex**](https://pypi.org/project/cutex/):  \n",
-    "\n",
-    "`pip install cutex`\n",
-    "\n",
     "### Performance Highlights\n",
     "\n",
     "- Official EAGLE code ([SafeAILab/EAGLE](https://github.com/SafeAILab/EAGLE)): ~200 tokens/s\n",

scripts/ci_install_dependency.sh

@@ -19,9 +19,6 @@ pip install torch_memory_saver --force-reinstall
 
 pip install transformers==4.45.2 sentence_transformers accelerate peft
 
-# For compling eagle kernels
-pip install cutex
-
 # For compling xgrammar kernels
 pip install cuda-python nvidia-cuda-nvrtc-cu12