Remove font-smoothing CSS (#6816)

block-canvas/style.css

@@ -27,15 +27,6 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 GNU General Public License for more details.
 */
 
-/*
- * Font smoothing
- * https://github.com/WordPress/gutenberg/issues/35934
- */
-body {
-	-moz-osx-font-smoothing: grayscale;
-	-webkit-font-smoothing: antialiased;
-}
-
 /*
  * Control the hover stylings of outline block style.
  * Unnecessary once block styles are configurable via theme.json