[core] Remove dead prop

[oliviertassinari]

I noticed this in #207 (comment), it doesn't seem to do anything anymore.

[mui-bot]

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[romgrk]

The prop seems to be passed in useGridVirtualScroller.tsx. If it's removed from there, it's going to end up in the ...other variable destructured a few lines later. Also if we can avoid touching that area I'd prefer it, it might cause conflicts with the sticky PR that is nearly complete.

mui-x/packages/grid/x-data-grid/src/hooks/features/virtualization/useGridVirtualScroller.tsx

Line 728 in fd31d66

row={model}

[romgrk]

Nevermind, got confused between cell & row. This makes sense, it's not used. I've picked up on the sticky PR as well to avoid conflicts. Our GridCell type extends { [x: string]: any } so we don't get warnings for this, we should clean up that type.