[core] don't run symbol placement more often than necessary

src/mbgl/tile/geometry_tile_worker.cpp

@@ -321,7 +321,6 @@ void GeometryTileWorker::attemptPlacement() {
     parent.invoke(&GeometryTile::onPlacement, GeometryTile::PlacementResult {
         std::move(buckets),
         std::move(collisionTile),
-        *placementConfig,
         correlationID
     });
 }