reverting to no prompt-logprobs support; merged in main

vllm/model_executor/models/llava_next.py

@@ -20,6 +20,7 @@
 from vllm.model_executor.sampling_metadata import SamplingMetadata
 from vllm.multimodal import MULTIMODAL_REGISTRY
 from vllm.sequence import IntermediateTensors
+from vllm.utils import is_list_of
 
 from .clip import (CLIPVisionModel, dummy_image_for_clip,
                    dummy_seq_data_for_clip, get_clip_image_feature_size,