Remove unused asset request IDs

Part request IDs were assigned and copied to build results but never read. Remove the fields, counter, and assignments; stale completion checks continue to use request identity and generation.

common/lc_assetloader.cpp

@@ -324,7 +324,6 @@ void lcAssetLoader::EnqueuePiece(PieceInfo* Info, Priority LoadPriority)
 	std::shared_ptr<Request> RequestedPart = std::make_shared<Request>();
 
 	RequestedPart->Info = Info;
-	RequestedPart->Id = mNextRequestId++;
 	RequestedPart->Generation = mGeneration;
 	RequestedPart->Source = mLibrary->SnapshotPieceSource(Info);
 	RequestedPart->LoadPriority = LoadPriority;
@@ -452,7 +451,6 @@ void lcAssetLoader::LoadQueuedPieces()
 				}
 			}
 
-			Completed.Result.RequestId = RequestedPart->Id;
 			Completed.Result.Generation = RequestedPart->Generation;
 		}
 		else if (RequestedTexture)

common/lc_assetloader.h

@@ -40,7 +40,6 @@ struct lcPartBuildResult
 	lcPartBuildResult(const lcPartBuildResult&) = delete;
 	lcPartBuildResult& operator=(const lcPartBuildResult&) = delete;
 
-	quint64 RequestId = 0;
 	quint64 Generation = 0;
 	std::unique_ptr<lcLibraryMeshData> MeshData;
 	std::unique_ptr<lcMesh> Mesh;
@@ -93,7 +92,6 @@ private:
 	struct Request
 	{
 		PieceInfo* Info;
-		quint64 Id;
 		quint64 Generation;
 		lcPartSourceSnapshot Source;
 		Priority LoadPriority;
@@ -227,7 +225,6 @@ private:
 	std::deque<SynthNotification> mSynthNotifications;
 	std::vector<QFuture<void>> mFutures;
 	int mActiveWorkers = 0;
-	quint64 mNextRequestId = 1;
 	quint64 mGeneration = 1;
 	bool mPaused = false;
 	bool mStopping = false;