[Misc] duplicate code in deepseek_v2 (vllm-project#14106)

Author: noooop

vllm/model_executor/models/deepseek_v2.py

@@ -105,7 +105,6 @@ def __init__(
         self.tp_size = get_tensor_model_parallel_world_size()
         self.routed_scaling_factor = config.routed_scaling_factor
         self.n_shared_experts = config.n_shared_experts
-        self.routed_scaling_factor = config.routed_scaling_factor
 
         if config.hidden_act != "silu":
             raise ValueError(f"Unsupported activation: {config.hidden_act}. "