[VLM][Refactor] Remove useless func `get_input_positions` in `MRotaryEmbedding` (#27088)

Signed-off-by: MengqingCao <cmq0113@163.com>

vllm/model_executor/layers/rotary_embedding/mrope.py

@@ -4,7 +4,6 @@
 
 import numpy as np
 import torch
-from transformers import PretrainedConfig
 
 from vllm.triton_utils import tl, triton
 
@@ -376,39 +375,6 @@ class MRotaryEmbedding(RotaryEmbedding):
     ) -> tuple[torch.Tensor, torch.Tensor | None]:
         return self.forward_native(positions, query, key, offsets)
 
-    @classmethod
-    def get_input_positions(
-        cls,
-        input_tokens: list[int],
-        hf_config: PretrainedConfig,
-        image_grid_thw: list[list[int]] | torch.Tensor | None,
-        video_grid_thw: list[list[int]] | torch.Tensor | None,
-        second_per_grid_ts: list[float] | None,
-        context_len: int = 0,
-        seq_len: int | None = None,
-        audio_feature_lengths: torch.Tensor | None = None,
-        use_audio_in_video: bool = False,
-    ) -> tuple[list[list[int]], int]:
-        """Get mrope input positions and delta value."""
-
-        image_grid_thw = [] if image_grid_thw is None else image_grid_thw
-        video_grid_thw = [] if video_grid_thw is None else video_grid_thw
-        second_per_grid_ts = [] if second_per_grid_ts is None else second_per_grid_ts
-
-        llm_positions, mrope_position_delta = cls.get_input_positions_tensor(
-            input_tokens=input_tokens,
-            hf_config=hf_config,
-            image_grid_thw=image_grid_thw,
-            video_grid_thw=video_grid_thw,
-            second_per_grid_ts=second_per_grid_ts,
-            context_len=context_len,
-            seq_len=seq_len,
-            audio_feature_lengths=audio_feature_lengths,
-            use_audio_in_video=use_audio_in_video,
-        )
-
-        return llm_positions.tolist(), mrope_position_delta
-
     @staticmethod
     def get_next_input_positions(
         mrope_position_delta: int,