fix: Fix TRTLLM disagg with kv router (#4950)

Signed-off-by: jthomson04 <jwillthomson19@gmail.com>
Co-authored-by: Ryan McCormick <rmccormick@nvidia.com>

components/src/dynamo/trtllm/request_handlers/handler_base.py

@@ -283,6 +283,10 @@ class HandlerBase:
         if "prefill_result" in request:
             if self.disaggregation_mode == DisaggregationMode.PREFILL:
                 raise ValueError("Cannot provide disaggregated_params in prefill mode")
+            request["prefill_result"].get("disaggregated_params", {}).pop(
+                "worker_id", None
+            )
+
             disaggregated_params = DisaggregatedParamsCodec.decode(
                 DisaggregatedParams(
                     **request["prefill_result"].get("disaggregated_params")