[mcl_minecarts] fix warnings

mods/ENTITIES/mcl_minecarts/init.lua

@@ -486,7 +486,6 @@ local function register_entity(entity_id, mesh, textures, drop, on_rightclick, o
 		if update.pos then
 			self.object:set_pos(pos)
 		end
-		update = nil
 	end
 
 	function cart:get_staticdata()
@@ -817,8 +816,7 @@ minetest.register_craft({
 })
 
 -- TODO: Re-enable crafting of special minecarts when they have been implemented
-if false then
-	minetest.register_craft({
+--[[minetest.register_craft({
 	output = "mcl_minecarts:furnace_minecart",
 	recipe = {
 		{"mcl_furnaces:furnace"},
@@ -840,8 +838,8 @@ if false then
 		{"mcl_chests:chest"},
 		{"mcl_minecarts:minecart"},
 	},
-	})
-end
+})]]
+
 
 if has_mcl_wip then
 	mcl_wip.register_wip_item("mcl_minecarts:chest_minecart")