Unfortunately, at the present time, there is no way to remove the suggested college on a student's page. It is primarily like sending an email. Once it is sent, it is delivered to the student tab.
Do not despair! The student has the power to remove (dismiss) this college once it lands on their tab. You may also send a quick message to the student via the SCOIR message center and let them know if you clicked this college in error. We realize that busy days sometimes result in the incorrect sharing of information, so utilize the message tab to communicate with your student as needed.