fix invalid import in checker
fix invalid import in checker

davelab6/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,moyogo/fontbakery,moyogo/fontbakery,jessamynsmith/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,graphicore/fontbakery