some packages no longer exist

[urasssopretty]

Xmake Version

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Operating System Version and Architecture

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Describe Bug

the packages opengl-headers and glbinding no longer exist but the examples remain in the documentation which is confusing

when I try to install/search I get this:

> xrepo install glbindings
error: package(glbindings) not found!
error: execv(xmake require -j 18 --extra={system=false} glbindings) failed(-1)

> xrepo search glbindings
The package names:
> 

and I know that I only need to use the "opengl" package

Expected Behavior

I think that the extra sections should be deleted

Project Configuration

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Additional Information and Error Logs

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