[material-ui][docs] Remove Data Grid v7 beta callout (@cherniavskii) (#…

…41842)

Co-authored-by: Andrew Cherniavskii <[email protected]>

docs/data/material/components/table/table.md

@@ -33,11 +33,6 @@ This constraint makes building rich data tables challenging.
 The [`DataGrid` component](/x/react-data-grid/) is designed for use-cases that are focused on handling large amounts of tabular data.
 While it comes with a more rigid structure, in exchange, you gain more powerful features.
 
-:::info
-The demo below uses the MUI X Data Grid v7, which is currently in beta.
-Visit [the documentation](https://next.mui.com/x/react-data-grid/) to learn more about it.
-:::
-
 {{"demo": "DataTable.js", "bg": "inline"}}
 
 ## Dense table