You can easily resend the deleted the ticket Sms by mistake to mobile if you've booked it online from your account.
But unfortunately it'll be sent only to your registered mobile number in your IRCTC account. It is the same number you've used to register your account at IRCTC. You might have changed it later.
Before you request to resend your ticket Sms please change your mobile number to the updated one.
Follow these steps after your mobile number has been updated.
You can make SMS ticket yourself and send it to any desired phone number!