diff --git a/problems/0019.删除链表的倒数第N个节点.md b/problems/0019.删除链表的倒数第N个节点.md
index c7f79b8d..a84c0b29 100644
--- a/problems/0019.删除链表的倒数第N个节点.md
+++ b/problems/0019.删除链表的倒数第N个节点.md
@@ -91,10 +91,6 @@ public ListNode removeNthFromEnd(ListNode head, int n){
     ListNode dummyNode = new ListNode(0);
     dummyNode.next = head;
 
-    //排除示例 2 的情况：head = [1], n = 1
-    if (head == null)
-        return null;
-
     ListNode fastIndex = dummyNode;
     ListNode slowIndex = dummyNode;