docs: remove Anchor not use api (#26672)

components/anchor/index.en-US.md

@@ -21,7 +21,6 @@ For displaying anchor hyperlinks on page and jumping between them.
 | affix | Fixed mode of Anchor | boolean | true |  |
 | bounds | Bounding distance of anchor area | number | 5 |  |
 | getContainer | Scrolling container | () => HTMLElement | () => window |  |
-| offsetBottom | Pixels to offset from bottom when calculating position of scroll | number | - |  |
 | offsetTop | Pixels to offset from top when calculating position of scroll | number | 0 |  |
 | showInkInFixed | Whether show ink-balls in Fixed mode | boolean | false |  |
 | onClick | Set the handler to handle `click` event | function(e: Event, link: Object) | - |  |

components/anchor/index.zh-CN.md

@@ -22,7 +22,6 @@ cover: https://gw.alipayobjects.com/zos/alicdn/_1-C1JwsC/Anchor.svg
 | affix | 固定模式 | boolean | true |  |
 | bounds | 锚点区域边界 | number | 5 |  |
 | getContainer | 指定滚动的容器 | () => HTMLElement | () => window |  |
-| offsetBottom | 距离窗口底部达到指定偏移量后触发 | number |  |  |
 | offsetTop | 距离窗口顶部达到指定偏移量后触发 | number |  |  |
 | showInkInFixed | 固定模式是否显示小圆点 | boolean | false |  |
 | onClick | `click` 事件的 handler | function(e: Event, link: Object) | - |  |