[misc] remove is_cuda_available (#5319)

python/sglang/srt/layers/activation.py

@@ -28,9 +28,9 @@ from sglang.srt.distributed import (
     get_tensor_model_parallel_world_size,
 )
 from sglang.srt.layers.quantization.base_config import QuantizationConfig
-from sglang.srt.utils import is_cuda_available, set_weight_attrs
+from sglang.srt.utils import is_cuda, set_weight_attrs
 
-_is_cuda = is_cuda_available()
+_is_cuda = is_cuda()
 
 if _is_cuda:
     from sgl_kernel import gelu_and_mul, gelu_tanh_and_mul, silu_and_mul