Dynamic module loading - you can now delete any file in the worldedit mod except init.lua, and the relevant functionality will simply not be included.

worldedit/compatibility.lua

@@ -1,3 +1,5 @@
+worldedit = worldedit or {}
+
 worldedit.allocate_old = worldedit.allocate
 worldedit.deserialize_old = worldedit.deserialize
 worldedit.metasave = function(pos1, pos2, filename)

worldedit/init.lua

@@ -1,7 +1,14 @@
 local path = minetest.get_modpath("worldedit")
-dofile(path .. "/manipulations.lua")
-dofile(path .. "/primitives.lua")
-dofile(path .. "/visualization.lua")
-dofile(path .. "/serialization.lua")
-dofile(path .. "/code.lua")
-dofile(path .. "/compatibility.lua")
+
+local loadmodule = function(path)
+	return pcall(function()
+		dofile(path)
+	end)
+end
+
+loadmodule(path .. "/manipulations.lua")
+loadmodule(path .. "/primitives.lua")
+loadmodule(path .. "/visualization.lua")
+loadmodule(path .. "/serialization.lua")
+loadmodule(path .. "/code.lua")
+loadmodule(path .. "/compatibility.lua")