Cleanup duplicate call (#522)

Luke aka SwissalpS

2019-12-25 76a39e71b9f81531e14efd7ec1b0accfefa0fa66

 technic/machines/register/recipes.lua

@@ -51,7 +51,7 @@
   end
   
   technic.recipes[typename].recipes[index] = recipe
   if unified_inventory and technic.recipes[typename].output_size == 1 then
   if have_ui and technic.recipes[typename].output_size == 1 then
      unified_inventory.register_craft({
         type = typename,
         output = data.output,