url_handlers: approve_receipts: Remove a redundant check
url_handlers: approve_receipts: Remove a redundant check

No need to check if we are an approver, twice.

Signed-off-by: Andrew Clayton <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@opentechlabs.co.uk>

ac000/receiptomatic