Remove workaround comment from animate-tray.jsx

Snippets are not the place to document issues. This is a legitimate
optimization even without the bug and should not be removed without
reason, and even if it was it should be tested.

Change-Id: Id75f08e3ffe797b083cd34afd97dea1206583349

Author: tbuschto

snippets/animate-tray.jsx

@@ -70,7 +70,7 @@ async function positionTrayInRestingState(velocity) {
   trayState = 'animating';
   const translationY = velocity > 0 ? trayHeight : 0;
   const options = {duration: Math.min(Math.abs(trayHeight / velocity * 1000), 800)};
-  if (tray.transform.translationY !== translationY) { // workaround eclipsesource/tabris-js#1988
+  if (tray.transform.translationY !== translationY) {
     await Promise.all([
       shade.animate({opacity: getShadeOpacity(translationY)}, options),
       strapIcon.animate({transform: getStrapIconTransform(translationY)}, options),