You can delete any campaigns from the Campaigns section of your account by taking the following steps:
Step 1: From your dashboard or any section of your account, click on Campaigns on the left panel.
Step 2: Locate the campaign you would like to delete from the list and click on the three dots at the extreme right.
Step 3: Select Delete from the options that pop up around the area.
Step 4: Confirm your deletion of the campaign by selecting Yes on the screen.
The campaign should immediately disappear from your campaign list.