clean unused file

[ZCShou]

No description provided.

[Copilot]

Pull Request Overview

This pull request removes unused files from the project to clean up the repository structure.

• Removes the quick-start.sh script which was no longer needed
• Deletes various documentation files in the doc/old/ directory
• Removes doc/SMP.md and doc/README.md documentation files
• Deletes numerous configuration files and device tree sources from the configs/vms_bkp/ directory

Reviewed Changes

Copilot reviewed 52 out of 60 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
quick-start.sh	Removes unused quick-start shell script
doc/old/Boot-on-rk3588.md	Removes outdated documentation for RK3588 board
doc/old/Boot-on-qemu.md	Removes outdated QEMU boot documentation
doc/SMP.md	Removes SMP support documentation
doc/README.md	Removes main documentation file
doc/GuestVMs.md	Removes guest VM documentation
configs/vms_bkp/*.toml	Removes backup configuration files
configs/vms_bkp/*.dts	Removes backup device tree source files

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