Remove redundant null check in conversation ID extraction (#64)

* Initial plan

* Remove redundant condition in _iter_conversation_pairs

Co-authored-by: nikhilNava <211831449+nikhilNava@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: nikhilNava <211831449+nikhilNava@users.noreply.github.com>

Author: Copilot

libraries/microsoft-agents-a365-observability-core/microsoft_agents_a365/observability/core/middleware/turn_context_baggage.py

@@ -163,11 +163,8 @@ def _iter_source_metadata_pairs(activity: Any) -> Iterator[tuple[str, Any]]:
 
 
 def _iter_conversation_pairs(activity: Any) -> Iterator[tuple[str, Any]]:
-    conversation_id = None
-
-    if not conversation_id:
-        conv = _safe_get(activity, "conversation")
-        conversation_id = _safe_get(conv, "id")
+    conv = _safe_get(activity, "conversation")
+    conversation_id = _safe_get(conv, "id")
 
     item_link = _safe_get(activity, "service_url")