style(problems): clean up whitespace in reverse-string solution

work/Easy/Two Pointers/344.reverse-string.js

@@ -37,7 +37,6 @@
  * @return {void} Do not return anything, modify s in-place instead.
  */
 var reverseString = function(s) {
-
     let i = 0;
     let j = s.length - 1;
     
@@ -45,5 +44,5 @@ var reverseString = function(s) {
         [s[i], s[j]] = [s[j], s[i]];
         j--;
         i++;
-    }
+    }   
 };