Fix: Syntax errors

Author: siddhant-khisty

assignments/17-trees.md

@@ -18,7 +18,6 @@
 - [Find Mode in Binary Search Tree](https://leetcode.com/problems/find-mode-in-binary-search-tree/) `leetcode`
 - [Minimum Absolute Difference in BST](https://leetcode.com/problems/minimum-absolute-difference-in-bst/) `leetcode`
 - [Diameter of Binary Tree](https://leetcode.com/problems/diameter-of-binary-tree/) `leetcode`
-- [https://leetcode.com/problems/binary-tree-tilt/](https://leetcode.com/problems/binary-tree-tilt/) `leetcode`
 
 ## Medium
 
@@ -62,4 +61,3 @@
 - [Create Components With Same Value](https://leetcode.com/problems/create-components-with-same-value/) `leetcode`
 - [Serialize and Deserialize Binary Tree](https://leetcode.com/problems/serialize-and-deserialize-binary-tree/) `leetcode`
 - [Longest Path With Different Adjacent Characters](https://leetcode.com/problems/longest-path-with-different-adjacent-characters/) `leetcode`
--