[docs] Remove todo link from sidebar

[brijeshb42]

PR for CssVarsProvider documentation separately

• I have followed (at least) the PR section of the contributing guide.

[mui-bot]

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[oliviertassinari]

I think that it would be great to copy what was great about the older page into the new ones. I believe that are 2 things: #35213 (comment).

[brijeshb42]

That was the idea but to move the docs for CssVarsProvider to mui-system docs instead of in material. That would be part of a separate PR as I need to modify the docs a little bit to refer to the system package. This PR was just to quickly remove the todo page.

@mnajdova

[mnajdova]

That was the idea but to move the docs for CssVarsProvider to mui-system docs instead of in material. That would be part of a separate PR as I need to modify the docs a little bit to refer to the system package. This PR was just to quickly remove the todo page.

I am ok with including the changes linked in Olivier's PR in the next PR.

[mnajdova]

Note, we will still need the pages in the Material UI docs, for people not familiar too much with how the @mui/system is related it could be great to have the content in the docs where they browser most of the features.

[mnajdova]

Thanks!