Removed inefficient environment manipulation functions

libs/core/luasrc/util.lua

@@ -118,37 +118,6 @@ end
 -- Scope manipulation routines
 --
 
---- Replace a function scope with a shallow copy of itself.
--- This is useful if you want to get rid of several unwanted side effects
--- while changing the scope of a certain Lua function.
--- @param f		Lua function
-function resfenv(f)
-	setfenv(f, clone(getfenv(f)))
-end
-
---- Store given object associated with given key in the scope of a function.
--- @param f		Lua function
--- @param key	String value containg the key of the object to store
--- @param obj	Object to store in the scope
--- @return		Always nil
--- @see updfenv
--- @see resfenv
-function extfenv(f, key, obj)
-	local scope = getfenv(f)
-	scope[key] = obj
-end
-
---- Extend the scope of a function with the contents of a table
--- @param f		Lua function
--- @param key	String value containg the key of the object to store
--- @param obj	Object to store in the scope
--- @return		Always nil
--- @see extfenv
--- @see resfenv
-function updfenv(f, extscope)
-	update(getfenv(f), extscope)
-end
-
 --- Create a new or get an already existing thread local store associated with
 -- the current active coroutine. A thread local store is private a table object
 -- whose values can't be accessed from outside of the running coroutine.