Fix translations that were added to ProductVariation (remove `sprintf`). Minor code cleanup (removed trailing commas in arrays).
Fix translations that were added to ProductVariation (remove `sprintf`).
Minor code cleanup (removed trailing commas in arrays).

silvershop/silvershop-core,burnbright/silverstripe-shop,burnbright/silverstripe-shop,burnbright/silverstripe-shop,hpeide/silverstripe-shop