Users are able to restore all deleted wallets in Edge. Simply go into the Settings --> Restore Wallets. After tapping Restore Wallets, a popup will show confirming that you would like to restore all deleted and archived wallets. Tap on Confirm and every wallet that has ever been deleted will be restored for that account.
However, if you deleted a wallet on Airbitz, that option is not available and you will need to reach out to us at support@edge.app so that our engineering team can manually restore the wallet(s).