[Bugfix][Qwen3VL] fix deepstack in qwen3vl (#26626)

Signed-off-by: liuye.hj <liuye.hj@alibaba-inc.com>
Signed-off-by: JJJYmmm <92386084+JJJYmmm@users.noreply.github.com>
Co-authored-by: liuye.hj <liuye.hj@alibaba-inc.com>

vllm/model_executor/models/qwen3_vl.py

@@ -1702,12 +1702,6 @@ class Qwen3VLForConditionalGeneration(
         )
 
         if deepstack_input_embeds is not None:
-            deepstack_input_embeds = (
-                torch.zeros_like(inputs_embeds)
-                .unsqueeze(0)
-                .repeat(self.deepstack_num_level, 1, 1)
-                .contiguous()
-            )
             self._set_deepstack_input_embeds(deepstack_input_embeds)
 
         return inputs_embeds