[MM][Model] Remove Qwen3-VL modeling files (#4577)

### What this PR does / why we need it?
Following https://github.com/vllm-project/vllm-ascend/pull/4349, remove
Qwen3-VL modeling files.

### Does this PR introduce _any_ user-facing change?

### How was this patch tested?

- vLLM version: v0.11.2
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.2

---------

Signed-off-by: shen-shanshan <467638484@qq.com>
Signed-off-by: Shanshan Shen <87969357+shen-shanshan@users.noreply.github.com>

vllm_ascend/patch/worker/patch_qwen2_5_vl.py

@@ -65,7 +65,7 @@ class AscendQwen2_5_VisionAttention(nn.Module):
         rotary_pos_emb_cos: torch.Tensor,
         rotary_pos_emb_sin: torch.Tensor,
         max_seqlen: torch.Tensor,
-        seqlens: torch.Tensor,
+        seqlens: torch.Tensor = None,
     ) -> torch.Tensor:
         # [s, b, c] --> [s, b, head * 3 * head_dim]
         x, _ = self.qkv(x)