Bug 1568301. Stop implementing JS-exposed QueryInterface on Selection. r=peterv

Differential Revision: https://phabricator.services.mozilla.com/D39083

--HG--
extra : moz-landing-system : lando

dom/webidl/LegacyQueryInterface.webidl

@@ -20,7 +20,6 @@ Document implements LegacyQueryInterface;
 DocumentFragment implements LegacyQueryInterface;
 Element implements LegacyQueryInterface;
 Event implements LegacyQueryInterface;
-Selection implements LegacyQueryInterface;
 TreeColumns implements LegacyQueryInterface;
 TreeContentView implements LegacyQueryInterface;
 Window implements LegacyQueryInterface;