Merge pull request #2507 from junhaoqu/fixlinkedlist19java

fix java version for linked list 19

Author: youngyangyang04

problems/0019.删除链表的倒数第N个节点.md

@@ -111,7 +111,6 @@ class Solution {
         for (int i = 0; i <= n; i++) {
             fastIndex = fastIndex.next;
         }
-
         while (fastIndex != null) {
             fastIndex = fastIndex.next;
             slowIndex = slowIndex.next;