A PropType error was shown in the console when on the Awaiting Swap
page in certain error scenarios. The `symbol` property was sometimes
not set if `destinationTokenInfo` was missing.
The `symbol` prop has been removed, as the `AwaitingSwap` component
already selected the `fetchParams`, and the `destinationTokenInfo`
object within. The prop was effectively a duplicate.
Mark Stacey
Dan J Miller