[bsp/gd32] remove gd32 bsp soft i2c config

[MuChenger]

拉取/合并请求描述：(PR description)

[

为什么提交这份PR (why to submit this PR)

emove gd32 bsp soft i2c config

]

当前拉取/合并请求的状态 Intent for your PR

必须选择一项 Choose one (Mandatory):

• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
• 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
• 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
• 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
• 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• 代码是高质量的 Code in this PR is of high quality
• 已经使用formatting 等源码格式化工具确保格式符合RT-Thread代码规范 This PR complies with RT-Thread code specification
• 如果是新增bsp, 已经添加ci检查到.github/ALL_BSP_COMPILE.json 详细请参考链接BSP自查

[github-actions]

📌 Code Review Assignment

🏷️ Tag: bsp_gd32105c-eval

Reviewers: @CXSforHPU

Changed Files (Click to expand)

• bsp/gd32/arm/gd32105c-eval/board/Kconfig

🏷️ Tag: bsp_gd32470z-lckfb

Reviewers: @godmial

Changed Files (Click to expand)

• bsp/gd32/arm/gd32470z-lckfb/board/Kconfig

🏷️ Tag: bsp_gd32e503v-eval

Reviewers: @meng-plus

Changed Files (Click to expand)

• bsp/gd32/arm/gd32e503v-eval/board/Kconfig

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📊 Current Review Status (Last Updated: 2025-08-29 10:59 CST)

• ⌛ @CXSforHPU Pending Review
• ⌛ @godmial Pending Review
• ⌛ @meng-plus Pending Review

---

📝 Review Instructions

1. 维护者可以通过单击此处来刷新审查状态: 🔄 刷新状态
   Maintainers can refresh the review status by clicking here: 🔄 Refresh Status

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   Comment LGTM/lgtm after confirming approval

3. PR合并前需至少一位维护者确认
   PR must be confirmed by at least one maintainer before merging

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ℹ️ Refresh CI status operation requires repository Write permission.

[supperthomas]

有加ci配置如何使用的吗？在某个bsp上？