If you would like to remove a study from your Dashboard view, you can Archive it. There is currently no option to delete a study.
Archiving a study is like deleting it except that it remains available for you to view in the Archived section of your Dashboard. Once you archive a study, all study actions become inactive.
To archive a study, simply click "Archive Study" under the Options dropdown on the study Dashboard. The Archive option is not available when studies are Live.