cleanup codebase (#46)

* cleanup codebase

* fix typo

* add nil checks to on_place

* nuke all mod loaded statements

bushes_classic/cooking.lua

@@ -33,9 +33,12 @@ end
 
 -- override farming_plus strawberry and add food_ group
 if minetest.get_modpath("farming_plus") then
+	local groups = table.copy(minetest.registered_items["farming_plus:strawberry_item"])
+	groups["food_strawberry"] = 1
+	groups["food_berry"] = 1
 
 	minetest.override_item("farming_plus:strawberry_item", {
-		groups = {food_strawberry = 1, food_berry = 1, flammable = 2},
+		groups = groups,
 	})
 end