…elper

### What changes were proposed in this pull request?
Remove an unused class.

### Why are the changes needed?
apache#2289

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
CI

Closes apache#2301 from kerwin-zk/issue-1265.

Authored-by: xiyu.zk <xiyu.zk@alibaba-inc.com>
Signed-off-by: SteNicholas <programgeek@163.com>