refactor 415

Author: fishercoder1534

Diff for: src/main/java/com/fishercoder/solutions/_415.java

@@ -1,17 +1,5 @@
 package com.fishercoder.solutions;
 
-/**
- * 415. Add Strings
- *
- * Given two non-negative numbers num1 and num2 represented as string, return the sum of num1 and num2.
-
- Note:
-
- 1. The length of both num1 and num2 is < 5100.
- 2. Both num1 and num2 contains only digits 0-9.
- 3. Both num1 and num2 does not contain any leading zero.
- 4. You must not use any built-in BigInteger library or convert the inputs to integer directly.
- */
 public class _415 {
 
     public static class Solution1 {