Material UI v5: remove the px suffix of theme.spacing

Proprietary

Removes the px that was appended to the result of theme.spacing(). Ported from the MUI codemod v5.0.0/theme-spacing.

org.openrewrite.react.mui.v5.theme-spacing
mod run . --recipe=org.openrewrite.react.mui.v5.theme-spacing

Install it once from Recipe actions, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.