[exercises/basic_recursion] Remove 'no helper functions' condition to reduce confusion.

Good point @ShadowManu, thanks.

Closes timoxley#125.

Author: timoxley

exercises/basic_recursion/problem.fr.md

@@ -47,7 +47,6 @@ reduce([1,2,3], function(prev, curr, index, arr) {
 
 * N’utilisez pas de boucle (`for`, `while`…)
 * N’utilisez aucune méthode de `Array`, du genre `Array#map()` ou `Array#reduce()`
-* Ne créez aucune fonction superflue
 
 ## Ressources
 

exercises/basic_recursion/problem.ko.md

@@ -46,7 +46,6 @@ reduce([1,2,3], function(prev, curr, index, arr) {
 
 * for/while 반복문을 사용하지 마세요.
 * Array#map이나 Array#reduce 같은 Array 메소드를 사용하지 마세요.
-* 헬퍼 같은 불필요한 함수를 만들지 마세요.
 
 ## 참고
 

exercises/basic_recursion/problem.md

@@ -47,7 +47,6 @@ reduce([1,2,3], function(prev, curr, index, arr) {
 
 * Do not use any for/while loops.
 * Do not use any Array methods like Array#map or Array#reduce.
-* Do not create any unecessary functions e.g. helpers.
 
 ## Resources