fix(ui-top-nav-bar): fix TopNavBarBrand flashing an outline on hover

The root cause was that now View uses the CSS outline prop to display its focus ring, but it was
overridden here

To test: Check the TopNavBarBrand example in the docs app
it should not flash an outline on hover

Fixes: INSTUI-4585

Author: matyasf

packages/ui-top-nav-bar/src/TopNavBar/TopNavBarBrand/styles.ts

@@ -59,7 +59,6 @@ const generateStyle = (
       justifyContent: 'flex-start',
       alignItems: 'stretch',
       border: 0,
-      outline: 0,
       padding: 0,
       margin: 0,
       appearance: 'none',