fix: update README.md

Author: yanglbme

solution/1000-1099/1096.Brace Expansion II/README.md

@@ -28,14 +28,6 @@
 输出：["acd","ace","bcd","bce"]
 ```
 
-**示例 2：**
-
-```
-输入："{{a,z}, a{b,c}, {ab,z}}"
-输出：["a","ab","ac","z"]
-解释：输出中 不应 出现重复的组合结果。
-```
-
 **提示：**
 
 1. `1 <= expression.length <= 50`