[misc] remove is_cuda_available (#5319)

python/sglang/srt/utils.py

@@ -130,10 +130,6 @@ def is_flashinfer_available():
     return importlib.util.find_spec("flashinfer") is not None and is_cuda()
 
 
-def is_cuda_available():
-    return is_cuda()
-
-
 _ENABLE_TORCH_INFERENCE_MODE = get_bool_env_var(
     "SGLANG_ENABLE_TORCH_INFERENCE_MODE", "false"
 )