To Delete, To Eliminate
する verb
If 削除 is "deletion," then the verb version would be to delete.
さくじょする
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
今お送りしたメッセージを削除して頂いてもよろしいでしょうか。別の方に送信するはずだったものなんです。
Could you delete the message I just sent you? I meant to send it to someone else.