Before:[4,5,1,9] 
node should be deleted is 5
After:[4,1,9]
Python Code:
class Solution:
    def deleteNode(self, node):
        temp = node
        k = node
        while temp.next !=None:
            temp.val = temp.next.val
            temp = temp.next
            if temp.next!=None:
                k = k.next
        k.next = None