Revert "[Bugfix] Fix MRoPE Errors in the Qwen-VL Model When Processing Pure Text (vllm-project#18407)" (vllm-project#18456)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

Author: DarkLight1337

vllm/worker/model_runner.py

@@ -729,6 +729,8 @@ def _compute_multi_modal_input(self, inter_data: InterDataForSeqGroup,
         mm_kwargs, placeholder_maps = MultiModalPlaceholderMap.from_seq_group(
             seq_group_metadata,
             range(positions[0], positions[0] + len(positions)))
+        if not mm_kwargs:
+            return
 
         inter_data.multi_modal_kwargs = mm_kwargs
         inter_data.multi_modal_placeholder_maps = placeholder_maps
@@ -739,6 +741,12 @@ def _compute_multi_modal_input(self, inter_data: InterDataForSeqGroup,
             video_grid_thw = mm_kwargs.get("video_grid_thw", None)
             audio_feature_lengths = mm_kwargs.get("audio_feature_lengths",
                                                   None)
+            assert (
+                image_grid_thw is not None or video_grid_thw is not None
+                or audio_feature_lengths is not None), (
+                    "mrope embedding type requires multi-modal input mapper "
+                    "returns 'image_grid_thw' or 'video_grid_thw' or "
+                    "'audio_feature_lengths'.")
 
             second_per_grid_ts = mm_kwargs.get("second_per_grid_ts", None)
             use_audio_in_video = mm_kwargs.get("use_audio_in_video", False)