Revert "only register packed ice when ethereal is not detected"

This reverts commit 01c70cd8.

depends.txt

@@ -6,7 +6,6 @@ homedecor
 doors
 stairs
 xpanes
-ethereal?
 3d_armor?
 fire?
 oresplus?

src/nodes.lua

@@ -413,18 +413,11 @@ register_hard_node("desertstone_tile", "Desert Stone Tile")
 register_hard_node("hard_clay", "Hardened Clay")
 register_hard_node("moonbrick", "Moon Brick")
 register_hard_node("stone_tile", "Stone Tile")
-register_hard_node("stone_rune", "Runestone", {
+register_hard_node("stone_rune", "Runestone")
+register_hard_node("packed_ice", "Packed Ice", {
 	groups = {cracky=1, puts_out_fire=1},
 	sounds = default.node_sound_glass_defaults()
 })
-if not minetest.get_modpath("ethereal") then
-    register_hard_node("packed_ice", "Packed Ice", {
-        groups = {cracky=1, puts_out_fire=1},
-        sounds = default.node_sound_glass_defaults()
-    })
-    elseif minetest.get_modpath("ethereal") then
-        minetest.register_alias("xdecor:packed_ice", "ethereal:icebrick")
-end
 register_hard_node("wood_tile", "Wooden Tile", {
 	groups = {choppy=1, wood=1, flammable=2},
 	sounds = default.node_sound_wood_defaults()