diff --git a/api/behaviors.lua b/api/behaviors.lua
index aa3c8d5..3ea7049 100644
--- a/api/behaviors.lua
+++ b/api/behaviors.lua
@@ -41,32 +41,6 @@ end
 local yaw2dir = minetest.yaw_to_dir
 local dir2yaw = minetest.dir_to_yaw
 
---------------
--- Settings --
---------------
-
-------------
--- Tables --
-------------
-
-local is_solid = {}
-
-minetest.register_on_mods_loaded(function()
-	for name in pairs(minetest.registered_nodes) do
-		if name ~= "air" and name ~= "ignore" then
-			if minetest.registered_nodes[name].walkable
-			or minetest.registered_nodes[name].drawtype == "liquid" then
-				is_flyable[name] = true
-				if minetest.registered_nodes[name].walkable then
-					is_solid[name] = true
-				else
-					is_liquid[name] = true
-				end
-			end
-		end
-	end
-end)
-
 ---------------------
 -- Local Utilities --
 ---------------------
@@ -1649,4 +1623,4 @@ creatura.register_utility("animalia:mount", function(self, player)
 		end
 	end
 	self:set_utility(func)
-end)
\ No newline at end of file
+end)