remove checks for 0.4.16 items

mapgen.lua

@@ -333,11 +333,8 @@ add_schem({"ethereal:bamboo_dirt"}, 0.08, {"bamboo"}, 1, 100, ethereal.bush, eth
 -- vine tree
 add_schem({"ethereal:green_dirt"}, 0.02, {"swamp"}, 1, 100, path .. "vinetree.mts", ethereal.swamp)
 
--- bushes
-
-if minetest.registered_nodes["default:acacia_bush_stem"] then
-
-	minetest.register_decoration({
+-- bush
+minetest.register_decoration({
 	deco_type = "schematic",
 	place_on = {"default:dirt_with_grass", "default:dirt_with_snow"},
 	sidelen = 16,
@@ -354,11 +351,10 @@ if minetest.registered_nodes["default:acacia_bush_stem"] then
 	y_max = 31000,
 	schematic = dpath .. "/bush.mts",
 	flags = "place_center_x, place_center_z",
-	})
+})
 
-	-- Acacia bush
-
-	minetest.register_decoration({
+-- Acacia bush
+minetest.register_decoration({
 	deco_type = "schematic",
 	place_on = {"default:dirt_with_dry_grass"},
 	sidelen = 16,
@@ -375,9 +371,7 @@ if minetest.registered_nodes["default:acacia_bush_stem"] then
 	y_max = 31000,
 	schematic = dpath .. "/acacia_bush.mts",
 	flags = "place_center_x, place_center_z",
-	})
-
-end
+})
 
 --= simple decorations
 
@@ -677,7 +671,7 @@ minetest.register_on_generated(function(minp, maxp)
 end)
 
 -- coral reef (0.4.15 only)
-if ethereal.reefs == 1 and minetest.registered_nodes["default:coral_orange"] then
+if ethereal.reefs == 1 then
 
 -- override corals so crystal shovel can pick them up intact
 minetest.override_item("default:coral_skeleton", {groups = {crumbly = 3}})