Yes, you can delete a Get Reviews campaign by following these steps:
1. Open the relevant Reputation Manager report and click the 'Get Reviews' tab.
2. Locate the email campaign you'd like to remove, and click the 'trash can' icon in the 'Actions' column (indicated below within the red box).
3. A popup will appear, asking you to type 'DELETE' within the box. Finally, click the red 'Delete' button.
That's it — you're all done.