docs(radio-tile): remove invalid labelText prop from story

[jendowns]

labelText is not a valid prop for the RadioTile component, so when it is used in the React storybook it generates the following console error (in local development) --

Text of error:

Warning: React does not recognize the `labelText` prop on a DOM element. If you intentionally want it to appear in the DOM as a custom attribute, spell it as lowercase `labeltext` instead. If you accidentally passed it from a parent component, remove it from the DOM element.
    in input (created by RadioTile)
    in RadioTile (created by TileGroup)
    in div (created by TileGroup)
    in fieldset (created by TileGroup)
    in TileGroup (created by Container)
    in div (created by Story)
    in Story (created by Container)
    in div (created by Container)
    in StrictMode (created by Container)
    in Container (created by storyFn)
    in storyFn
    in ErrorBoundary

This PR proposes removing usage of labelText prop in the storybook, which removes the console errors in local development. 👍

Changelog

Removed

• remove labelText prop usage in RadioTile component story

Testing / Reviewing

I suggest running the storybook locally & then viewing the dev console in Chrome
Even without pulling down my remote, you could run the storybook, observe the console errors, and then remove the lines that I removed -- the usage of labelText

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[dakahn]

🏄 Thanks!

[asudoh]

LGTM 👍 - Thanks @jendowns!