In case you want to delete one or more certificates, follow the steps below.
Step 1: Navigate to the "Certificates" tab.
Step 2: Using the checkbox located on the left hand-side of the element title, select the certificates you want to delete; to select all certificates within a section, click on the checkbox next to "Element."
Step 3: Click on "Actions," and then "Delete."
Step 4: You will be asked to confirm your choice; if you are sure, click on OK.
Step 5: Your changes will be saved.