cleanup

src/mol-app/ui/transform/ball-and-stick.tsx

src/mol-app/ui/transform/spacefill.tsx

src/mol-geo/representation/index.ts

src/mol-geo/representation/structure/index.ts

...mol-geo/representation/structure/visual/element-sphere.ts

src/mol-geo/representation/structure/visual/util/link.ts

src/mol-geo/representation/util.ts