chore: remove unused gtk-thumbnailer module

[mhduiy]

1. Removed gtk-thumbnailer from TESTS list in Makefile
2. Removed gtk-thumbnailer from BINARIES list in Makefile
3. Deleted main.go file containing GTK thumbnail generation logic
4. Deleted thumbnail.c file with GTK widget rendering implementation
5. Cleaned up build system to exclude this unused component

This change removes the gtk-thumbnailer module which was no longer needed in the project. The module contained CGO-based GTK thumbnail generation code that created visual previews of GTK themes. Since this functionality is no longer required or maintained, removing it simplifies the codebase, reduces maintenance overhead, and eliminates unused dependencies on GTK libraries.

Influence:

1. Verify that the project builds successfully without the gtk- thumbnailer module
2. Ensure no other components depend on the removed gtk-thumbnailer functionality
3. Test that all remaining tests in the TESTS list still pass
4. Confirm that all remaining binaries in the BINARIES list build correctly
5. Check that the build system doesn't reference the removed files elsewhere

chore: 移除未使用的 gtk-thumbnailer 模块

1. 从 Makefile 的 TESTS 列表中移除 gtk-thumbnailer
2. 从 Makefile 的 BINARIES 列表中移除 gtk-thumbnailer
3. 删除包含 GTK 缩略图生成逻辑的 main.go 文件
4. 删除包含 GTK 部件渲染实现的 thumbnail.c 文件
5. 清理构建系统以排除此未使用的组件

此更改移除了项目中不再需要的 gtk-thumbnailer 模块。该模块包含基于 CGO 的
GTK 缩略图生成代码，用于创建 GTK 主题的视觉预览。由于此功能不再需要或维
护，移除它可以简化代码库，减少维护开销，并消除对 GTK 库的未使用依赖。

Influence:

1. 验证项目在没有 gtk-thumbnailer 模块的情况下能成功构建
2. 确保没有其他组件依赖于已移除的 gtk-thumbnailer 功能
3. 测试 TESTS 列表中所有剩余的测试是否仍然通过
4. 确认 BINARIES 列表中所有剩余的二进制文件能正确构建
5. 检查构建系统是否在其他地方引用了已移除的文件

Summary by Sourcery

Remove the deprecated gtk-thumbnailer component from the codebase and build outputs.

Build:

• Drop gtk-thumbnailer from the TESTS and BINARIES lists in the Makefile to stop building and testing this component.

Chores:

• Delete the unused gtk-thumbnailer source files and clean up references to this module.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR removes the unused gtk-thumbnailer module by deleting its source files and stripping it from the build/test configuration so it is no longer built, tested, or referenced by the build system.

File-Level Changes

Change	Details	Files
Removed gtk-thumbnailer from test and binary build targets in the Makefile so it is no longer built or tested.	Dropped the gtk-thumbnailer package entry from the TESTS list. Removed the gtk-thumbnailer binary entry from the BINARIES list.	Makefile
Deleted the gtk-thumbnailer module implementation and its CGO-based GTK thumbnail rendering code.	Removed the Go entry point implementing GTK thumbnail generation logic. Removed the C file providing GTK widget rendering used via CGO.	gtk-thumbnailer/main.go gtk-thumbnailer/thumbnail.c

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[deepin-ci-robot]

deepin pr auto review

我来对这次代码变更进行审查：

1. 变更概述：

• 删除了 gtk-thumbnailer 相关的代码，包括：
  • Makefile 中的测试和二进制目标
  • main.go 和 thumbnail.c 的源文件

2. 代码质量分析：

• 删除操作是完整的，没有遗留任何相关引用
• 从 Makefile 中正确移除了相关目标
• 清理了所有相关源文件

3. 安全性分析：

• 删除了使用 CGO 的代码，减少了潜在的安全风险
• 移除了直接调用 C 代码的部分，降低了内存安全风险
• 删除了文件系统操作相关的代码，减少了权限相关的安全隐患

4. 性能影响：

• 移除了 gtk-thumbnailer 组件可能会减少整体构建时间
• 减少了运行时的依赖（GTK 相关）
• 降低了内存占用

5. 建议和改进：

• 建议确认是否需要这个功能，如果确实不需要，这个删除是合适的
• 如果这个功能在其他地方被使用，需要确保有替代方案
• 建议在删除日志或提交信息中说明删除原因
• 建议检查是否有其他依赖这个组件的代码需要同步更新

6. 其他注意事项：

• 删除了 SPDX 许可证声明，需要确保这是合适的
• 删除了测试用例，需要确认这些测试是否真的不再需要

总结：
这次变更看起来是一个合理的清理工作，移除了不再需要的 gtk-thumbnailer 组件。变更本身是完整的，没有遗留问题。建议在提交时添加更详细的说明，解释删除这个组件的原因，以及这个功能是否有替代方案。

[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: fly602, mhduiy

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• debian/deepin/OWNERS

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