Remove redundant code from Qwen3VLProcessor (#41836)

* Remove redundant code from Qwen3VLProcessor

* same modification to modular_qwen3_vl.py

Author: Xqle

src/transformers/models/qwen3_vl/modular_qwen3_vl.py

@@ -1316,7 +1316,6 @@ def __call__(
                 video_metadata = videos_inputs.pop("video_metadata")
             else:
                 video_metadata = videos_inputs["video_metadata"]
-            video_grid_thw = videos_inputs["video_grid_thw"]
         else:
             videos_inputs = {}
             video_grid_thw = None

src/transformers/models/qwen3_vl/processing_qwen3_vl.py

@@ -157,7 +157,6 @@ def __call__(
                 video_metadata = videos_inputs.pop("video_metadata")
             else:
                 video_metadata = videos_inputs["video_metadata"]
-            video_grid_thw = videos_inputs["video_grid_thw"]
         else:
             videos_inputs = {}
             video_grid_thw = None