Edit/Delete Sequence

Click on the Sequences tab from the navigation bar.
Click on the Edit button or Sequence Name to edit the sequence.
You will be navigated to the Sequence Editor screen.
In order to delete any sequence, mark the checkbox for the Sequence that you want to delete.
Click on the Bulk Actions drop down and select Delete.
Click on the Apply button and a message will be displayed that selected Sequences have been deleted from this page.
Screenshots are attached below for your reference.
Select the sequence and then select Delete from bulk Action to delete the sequence.
Click on the Apply button to apply the delete action.