chore: remove unused variable. Suspect CI failed due to warning.

yuzurihaaa · yuzurihaaa · commit 0302725532cd · 2025-01-15T15:21:33.000+08:00
diff --git a/lib/src/api/context/context.dart b/lib/src/api/context/context.dart
@@ -19,7 +19,6 @@ final Logger _log = Logger('opentelemetry');
 // TODO: @sealed
 class ContextKey {}
 
-final ContextKey _contextStackKey = ContextKey();
 final ContextKey _spanKey = ContextKey();
 
 @sealed
