Only forbid unnecessary functions.

Relaxing conditions. timoxley#52

Author: timoxley

problems/function_spies/problem.md

@@ -25,9 +25,8 @@ console.log(spy.count) // 3
 ## Conditions
 
 * Do not use any for/while loops.
-* You do not need to define any additional functions
-  unless a stub is provided in the boilerplate.
-
+* Do not create any unecessary functions e.g. helpers.
+ 
 ## Hint
 
 * Functions have context, input and output. Make sure you consider the context,