How do I remove a Trojan virus on my ipad 2?

Please explain. What leads you to think you have a Trojan?

You don't because you don't have a Trojan virus on your iPad.

What exactly is your problem with the iPad?

If you got a pop up message telling you that you have a virus then it's a scam. As of now, there is no known virus for the iPad and those pop up messages are just scammy ads trying to sell you stuff you don't need.