diff --git a/init.lua b/init.lua
index 00a3fc5..5375903 100644
--- a/init.lua
+++ b/init.lua
@@ -43,7 +43,8 @@ unified_inventory = {
 	imgscale = 1.25,
 	list_img_offset = 0.13,
 	standard_background = "background9[0,0;1,1;ui_formbg_9_sliced.png;true;16]",
-	version = 2
+
+	version = 3
 }
 
 local ui = unified_inventory
diff --git a/internal.lua b/internal.lua
index 7649bae..dd7415a 100644
--- a/internal.lua
+++ b/internal.lua
@@ -383,60 +383,3 @@ function ui.apply_filter(player, filter, search_dir)
 	ui.set_inventory_formspec(player,
 	ui.current_page[player_name])
 end
-
-function ui.items_in_group(groups)
-	local items = {}
-	for name, item in pairs(minetest.registered_items) do
-		for _, group in pairs(groups:split(',')) do
-			if item.groups[group] then
-				table.insert(items, name)
-			end
-		end
-	end
-	return items
-end
-
-function ui.sort_inventory(inv)
-	local inlist = inv:get_list("main")
-	local typecnt = {}
-	local typekeys = {}
-	for _, st in ipairs(inlist) do
-		if not st:is_empty() then
-			local n = st:get_name()
-			local w = st:get_wear()
-			local m = st:get_metadata()
-			local k = string.format("%s %05d %s", n, w, m)
-			if not typecnt[k] then
-				typecnt[k] = {
-					name = n,
-					wear = w,
-					metadata = m,
-					stack_max = st:get_stack_max(),
-					count = 0,
-				}
-				table.insert(typekeys, k)
-			end
-			typecnt[k].count = typecnt[k].count + st:get_count()
-		end
-	end
-	table.sort(typekeys)
-	local outlist = {}
-	for _, k in ipairs(typekeys) do
-		local tc = typecnt[k]
-		while tc.count > 0 do
-			local c = math.min(tc.count, tc.stack_max)
-			table.insert(outlist, ItemStack({
-				name = tc.name,
-				wear = tc.wear,
-				metadata = tc.metadata,
-				count = c,
-			}))
-			tc.count = tc.count - c
-		end
-	end
-	if #outlist > #inlist then return end
-	while #outlist < #inlist do
-		table.insert(outlist, ItemStack(nil))
-	end
-	inv:set_list("main", outlist)
-end