docs(tile): remove duplicate text (carbon-design-system#4823)

Author: alisonjoseph

src/pages/components/tile/code.mdx

@@ -74,10 +74,6 @@ feature flags will become the default version of the component.
 
 - The `enable-tile-contrast` flag adds a border to the tile with improved
   contrast for accessibility and to visually indicate they are operable.
-- The `enable-v12-tile-default-icons` flag enables the rendering of default
-  icons on the clickable variant of tile like the ArrowRight icon for navigation
-  or Error icon when it is disabled if the user hasn't configured a different
-  icon already.
 - The `enable-v12-tile-default-icons` flag enables the rendering of default
   icons on the clickable variant of a tile, such as the ArrowRight icon for
   navigation or the Error icon when the tile is disabled. If the user hasn't