fix issue #9728: check if script is being run by root

[freebased]

[MinerYang]

Hi @freebased,

This install process can be conducted by not only root user ($EUID eq 0), but also by the users who has root permissions, for example sudo ./install.sh.

So I think it's not appropriate enough to do this check. We will get permission denied errors if you don't have root permissions.

[github-actions[bot]]

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