diff --git a/src/lib/sim/BuildingSystem.h b/src/lib/sim/BuildingSystem.h
index 4068da8..4e70846 100644
--- a/src/lib/sim/BuildingSystem.h
+++ b/src/lib/sim/BuildingSystem.h
@@ -152,7 +152,6 @@ public:
     // Producing while its output buffer holds scrap, Starved when empty.
     std::optional<ProductionStatus> getProductionStatus(const Building& building) const;
     std::vector<BeltTileInfo> getAllBeltTiles()             const;
-    bool                      isTileOccupied(QPoint tile) const;
 
     // Visits every item currently emerging from a building output port on its
     // virtual output belt (REQ-MAT-OUTPUT-EMERGE), passing the item type and its
@@ -179,8 +178,6 @@ public:
     // currently on the tile are discarded by BeltSystem::removeTile).
     void rotateInPlace(BuildingId id, Rotation newRotation);
 
-    // Find nearest operational building of the given type; nullptr if none.
-    const Building* findNearestBuilding(QVector2D worldPos, BuildingType type) const;
 
     // Input-capable adjacent tiles for a building or construction site
     // (REQ-BLD-BELT-DRAG, REQ-MAT-INPUT-PORTS): each returned Port.tile is the