diff --git a/OpenRA.Game/MiniYaml.cs b/OpenRA.Game/MiniYaml.cs
index 4a803e2455..f5af94378f 100644
--- a/OpenRA.Game/MiniYaml.cs
+++ b/OpenRA.Game/MiniYaml.cs
@@ -380,19 +380,6 @@ namespace OpenRA
 			return resolved;
 		}
 
-		/// <summary>
-		/// Merges any duplicate keys that are defined within the same set of nodes.
-		/// Does not resolve inheritance or node removals.
-		/// </summary>
-		static MiniYaml MergeSelfPartial(MiniYaml existingNodes)
-		{
-			// Nothing to do
-			if (existingNodes.Nodes == null || existingNodes.Nodes.Count == 0)
-				return existingNodes;
-
-			return new MiniYaml(existingNodes.Value, MergeSelfPartial(existingNodes.Nodes));
-		}
-
 		/// <summary>
 		/// Merges any duplicate keys that are defined within the same set of nodes.
 		/// Does not resolve inheritance or node removals.