chore: remove duplicate removeEventListener call

[TrickyPi]

早上关编辑器的时候，忽然瞄到的，这个应该是不小心的多调了一次 removeEventListener 吧

[gemini-code-assist]

Summary of Changes

Hello @TrickyPi, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on a minor code cleanup by eliminating a redundant removeEventListener call. The change specifically targets the onDragEnd method in the Slider component, where a duplicate listener for pointermove was being removed. This adjustment enhances code clarity and maintains the intended functionality without any behavioral changes.

Highlights

• Code Cleanup: Removed a duplicate removeEventListener call for the pointermove event within the onDragEnd method of the Slider component.

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[gemini-code-assist]

Code Review

本次 PR 移除了 onDragEnd 方法中一个重复的 removeEventListener 调用。这是一个正确的修复，可以提高代码的整洁性和可维护性。做得很好！