Right-click the connection line or hidden edge label (numbered circle next to an Activity Input, Activity Output, block input, or block output: , , or ) and select Delete. The Confirm dialog box appears asking you to confirm the deletion. See the Confirm (Delete) screen section.
Note: You also can select a connection line or hidden edge label and press the Delete key to perform this function.
Click Yes.
Note: When a hidden edge label indicates multiple connections (for example, 1:5), only the connection added last is deleted. If you need to delete a specific connection, unhide the connection lines and remove the appropriate connection.