Forcefield: Remove deprecated update_map() call (#467)

Lejo

2018-12-09 aa82fa1d1379ca2adc552a5e90cfa9a77da3edd6

 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,