refactor 217

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_217.java

@@ -3,13 +3,6 @@
 import java.util.HashSet;
 import java.util.Set;
 
-/**
- * 217. Contains Duplicate
- *
- * Given an array of integers, find if the array contains any
- * duplicates. Your function should return true if any value appears at least twice in the array,
- * and it should return false if every element is distinct.
- */
 public class _217 {
     public static class Solution1 {
         public boolean containsDuplicate(int[] nums) {