removed outdated doc paragraph about functions

docs/language.md

@@ -275,46 +275,4 @@ As an example, the `print` function always returns `none`
 
 ```py
 print(print()); # none
-```
-
-Functions are always "pure", in the sense that the only values that the
-function body can access are the ones provided as arguments. Usually in
-other languages, functions can access the global scope and the parent
-scope (closures). There's no such mechanism in this language (at the 
-moment).
-
-The only exception is made for the "built in" variables, which are 
-provided by the runtime of the language and can't be modified by the
-user. The print function is one of these variables. One may override
-these variables but the effect only lasts for the lifetame of the
-context local to the assignment.
-
-```py
-# Overwrite the print variable inside the global 
-# scope..
-print = 5;
-
-# The reference to the print function is lost 
-# withing this scope.
-
-fun test()
-	{
-		# If the previous assignment were to overwrite the 
-		# print function globally, the next statement would 
-		# fail because the value 5 isn't a function. But
-		# it doesn't fail!
-		print('Not overwritten here!\n');
-	}
-
-test();
-
-# We can take the reference to the print function 
-# by taking it from a function!
-
-fun get_print_back()
-	return print;
-
-print = get_print_back();
-
-print('Hei! Print is back!\n');
 ```