update submodule illuna_ethereal

.gitmodules

@@ -188,9 +188,6 @@
 [submodule "mods/names_per_ip"]
 	path = mods/names_per_ip
 	url = https://github.com/SmallJoker/names_per_ip
-[submodule "mods/inventory_plus"]
-	path = mods/inventory_plus
-	url = https://git.tchncs.de/Illuna-Minetest/inventory_plus
 [submodule "mods/mobs_more_monsters"]
 	path = mods/mobs_more_monsters
 	url = https://git.tchncs.de/Illuna-Minetest/mobs_more_monsters

illuna_ethereal @ 613c920e

-Subproject commit d8c3b76c46cac29145fc3c8d4329b05093725342
+Subproject commit 613c920eddb8387ddcc021b0df9c2bacf789ebbc

inventory_plus @ ad9a1c5e

-Subproject commit ad9a1c5e9fc80c41bb15e84638713e07ecf5c7ad