[core] Remove workspace dependencies from root package.json

[michaldudak]

As noted in #38920 (comment), yarn + lerna, unlike pnpm, don't work well with root package.json having dependencies to subprojects. Since this is not strictly required for yarn, I'm removing these dependencies from package.json.

[mui-bot]

Netlify deploy preview

https://deploy-preview-38940--material-ui.netlify.app/

@material-ui/core: parsed: +Infinity% , gzip: +Infinity%
@material-ui/lab: parsed: +Infinity% , gzip: +Infinity%
@material-ui/styles: parsed: +Infinity% , gzip: +Infinity%
@material-ui/private-theming: parsed: +Infinity% , gzip: +Infinity%
@material-ui/system: parsed: +Infinity% , gzip: +Infinity%
@material-ui/unstyled: parsed: +Infinity% , gzip: +Infinity%
@material-ui/utils: parsed: +Infinity% , gzip: +Infinity%
@mui/material-next: parsed: +Infinity% , gzip: +Infinity%
@mui/joy: parsed: +Infinity% , gzip: +Infinity%

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Generated by 🚫 dangerJS against 415e769

[DiegoAndai]

Maybe this is not necessary? If we're moving to pnpm, updating the versions manually until we migrate from yarn is not that bad. What do you think?

[michaldudak]

The pnpm PR has these added anyway, so removing them for now is better if yarn doesn't support them.