Revert "[Feat] Shared expert dp for deepseek and deepseek_mtp (#3495)" (#3586)

### What this PR does / why we need it?
This reverts commit
bf87606932.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
E2E vllm serving with `enable_shared_expert_dp: true` in eager mode as
before.


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

Signed-off-by: linfeng-yuan <1102311262@qq.com>

vllm_ascend/spec_decode/mtp_proposer.py

@@ -82,7 +82,9 @@ class MtpProposer(Proposer):
         with set_default_torch_dtype(
                 draft_model_config.dtype), set_current_vllm_config(
                     self.vllm_config):
-            if self.torchair_graph_enabled:
+            if self.torchair_graph_enabled or (
+                    self.enable_shared_expert_dp
+                    and self.vllm_config.model_config.use_mla):
                 self.model = TorchairDeepSeekMTP(
                     vllm_config=self.vllm_config).to(target_device)
             else: