1. Find the particular campaign you want to find to run the deletion and click edit (Community, Pages or Catalog)
2. Once you've chosen the campaign, head to the transactions tab within the campaign card
3. From here, choose the transaction you are looking to delete by clicking the detailed edit pencil (the darker one)
4. Once inside the order, scroll down the page until you see the checked active button and uncheck that button
You've now completed deleting that transaction.