Remove unused row_idx in token_dispatcher (#3442)

### What this PR does / why we need it?
The `row_idx` parameter is no longer used since
PR[#2689](https://github.com/vllm-project/vllm-ascend/pull/2689), so
remove it across multiple files to remove unnecessary calculations and
parameter passing.

### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
accuracy test passed for Qwen3 235B and DeepSeek V3 671B after this PR.


- vLLM version: v0.11.0rc3
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0

---------

Signed-off-by: CaranLic <740821011@qq.com>

vllm_ascend/ops/moe/moe_comm_method.py

@@ -88,7 +88,6 @@ class MoECommMethod(ABC):
             w2: torch.Tensor,
             topk_weights: torch.Tensor,
             topk_ids: torch.Tensor,
-            row_idx: torch.Tensor,
             activation: str = "silu",
             apply_router_weight_on_input: bool = False,
             use_int8_w8a8: bool = False,
@@ -122,7 +121,6 @@ class MoECommMethod(ABC):
             hidden_states=hidden_states,
             topk_weights=topk_weights,
             topk_ids=topk_ids,
-            row_idx=row_idx,
             expert_map=expert_map,
             log2phy=log2phy,
             global_redundant_expert_num=global_redundant_expert_num,