rm Construct_Binary_Tree_from_Inorder_and_Postorder_Traversal.java; it is marked as duplicate of leetcode_Construct_Binary_Tree_from_Inorder_and_Postorder_Traversal.java and leetcode_Construct_Binary_Tree_from_Preorder_and_Inorder_Traversal.java
modified leetcode_Construct_Binary_Tree_from_Inorder_and_Postorder_Traversal.java; tried to use Arrays.copyOfRange to make array copy more java but failed some test cases