use the minetest provided table copy function

homedecor/doors_and_gates.lua

@@ -400,7 +400,7 @@ for i in ipairs(gates_list) do
 	minetest.register_node("homedecor:gate_"..gate.."_closed", def)
 
     -- this is either a terrible idea or a great one
-    def = homedecor.table_copy(def)
+    def = table.copy(def)
     def.groups.not_in_creative_inventory = 1
     def.selection_box.fixed = { 0.4, -0.5, -0.5, 0.5, 0.5, 0.5 }
     def.node_box.fixed = gate_models_open[i]

homedecor/init.lua

@@ -19,19 +19,6 @@ homedecor = {
 	expect_infinite_stacks = minetest.setting_getbool("creative_mode") and not minetest.get_modpath("unified_inventory")
 }
 
---table copy
-function homedecor.table_copy(t)
-	local nt = { };
-	for k, v in pairs(t) do
-		if type(v) == "table" then
-			nt[k] = homedecor.table_copy(v)
-		else
-			nt[k] = v
-		end
-	end
-	return nt
-end
-
 -- Determine if the item being pointed at is the underside of a node (e.g a ceiling)
 function homedecor.find_ceiling(itemstack, placer, pointed_thing)
 	-- most of this is copied from the rotate-and-place function in builtin