How to clear outbound queue for the mobile device?

Hello,

We are using Mobile 7.1. We defined by mistake the extract job to run every hour so the outbound queue of the mobile device includes hundreds of thousands of messages with the same information. We don't want to send them to the device during the synchronization because it will take several hours to synchronize the device. Is there any way to clear the device outbound queue?

Thanks in advance,

Sergey Kozyrev