Make abandon comment self-contained (drop Python reference)

The prior note referenced durabletask-python behavior, which is fragile: the Python single-work-item support lives on an unmerged fork PR and its details can drift. Trim the comment to the JS-only rationale for the no-op abandon on the single-work-item host path. Comment-only change.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: YunchuWang

packages/durabletask-js/src/worker/task-hub-grpc-worker.ts

@@ -1270,9 +1270,7 @@ class CapturingSidecarStub {
     // Abandon is a no-op for the single-work-item host path: the version-mismatch abandon branch
     // in _executeOrchestratorInternal calls this, but processOrchestratorRequest only surfaces a
     // completion response. Record it so the caller can distinguish an abandoned work item from a
-    // genuine "no response produced" failure. This single-work-item helper is JS-specific for the
-    // Azure Functions host integration; durabletask-python has no equivalent helper, and its
-    // worker-loop abandon hands the item back over a real sidecar stub rather than no-opping here.
+    // genuine "no response produced" failure.
     this.abandoned = true;
     callback(null, new Empty());
   }