Commenting useless (unused) craft recipes

- Craft recipes using undeclared group:wood_slab commented.

mods/homedecor_modpack/lrfurn/armchairs.lua

@@ -78,14 +78,14 @@ for i in ipairs(armchairs_list) do
 		}
 	})
 
-	minetest.register_craft({
+	--[[minetest.register_craft({
 		output = "lrfurn:armchair_"..colour,
 		recipe = {
 			{"wool:"..colour, "", "", },
 			{"group:wood_slab", "", "", },
 			{"group:stick", "", "", }
 		}
-	})
+	})]] -- Uncomment if further declaration of a group:wood_slab
 
 end