fix(app): 修复 picker 组件默认插槽不生效的bug

[chouchouji]

No description provided.

[github-actions]

Size report

Path	Size
packages/size-check/dist/size-check.es.js	47.18 KB (0%)
packages/size-check/dist/style.css	2.82 KB (0%)
packages/uni-app/dist/uni-app.es.js	2.47 KB (0%)
packages/uni-h5-vue/dist/vue.runtime.esm.js	76.41 KB (0%)
packages/uni-mp-vue/dist/vue.runtime.esm.js	43.13 KB (0%)
packages/uni-mp-alipay/dist/uni.api.esm.js	14.69 KB (0%)
packages/uni-mp-alipay/dist/uni.mp.esm.js	7.99 KB (0%)
packages/uni-mp-baidu/dist/uni.api.esm.js	11.34 KB (0%)
packages/uni-mp-baidu/dist/uni.mp.esm.js	9.68 KB (0%)
packages/uni-mp-qq/dist/uni.api.esm.js	10.65 KB (0%)
packages/uni-mp-qq/dist/uni.mp.esm.js	7.6 KB (0%)
packages/uni-mp-toutiao/dist/uni.api.esm.js	10.53 KB (0%)
packages/uni-mp-toutiao/dist/uni.mp.esm.js	9.42 KB (0%)
packages/uni-mp-weixin/dist/uni.api.esm.js	11.66 KB (0%)
packages/uni-mp-weixin/dist/uni.mp.esm.js	7.94 KB (0%)
packages/uni-quickapp-webview/dist/uni.api.esm.js	10.6 KB (0%)
packages/uni-quickapp-webview/dist/uni.mp.esm.js	8.16 KB (0%)

[Copilot]

Pull Request Overview

This PR removes an unused element from the picker component to simplify the markup and reduce unnecessary DOM elements.

• Removed the unused tag within the uni-picker component.

Comments suppressed due to low confidence (1)

packages/uni-app-plus/src/view/components/picker/index.tsx:355

• The removal of the element simplifies the component's markup. Please ensure that this change does not adversely affect consumers expecting to inject custom content via this slot.

<slot />