fix: uniswapx opt in double bounce animation (#6964)

src/pages/Swap/UniswapXOptIn.tsx

@@ -72,16 +72,11 @@ const OptInContents = ({
   const [, setRouterPreference] = useRouterPreference()
   const dispatch = useAppDispatch()
   const [showYoureIn, setShowYoureIn] = useState(false)
-  const [isVisible, setIsVisible] = useState(false)
+  const isVisible = isOnClassic
 
   // adding this as we need to mount and then set shouldAnimate = true after it mounts to avoid a flicker on initial mount
   const [shouldAnimate, setShouldAnimate] = useState(false)
 
-  // delayed a second to allow mount animation
-  useEffect(() => {
-    setIsVisible(Boolean(trade && isOnClassic))
-  }, [isOnClassic, trade])
-
   useEffect(() => {
     if (!isVisible || shouldAnimate) return
     // delay visible animation a bit