In case you want to remove a tag from a connection you just need to find that specific connection and then click on the ellipsis (⋯) - More Menu - on the right-hand side of the connection row and select Remove Tag(s) option.

You can also perform the bulk tag removal by ticking the checkbox on the left-hand side for the connections you wish to delete, clicking on the ellipsis (⋯) in the action bar and selecting Remove Tag(s) option.

Once you click on the Remove Tag(s) option/button, a popup will appear presenting the field where you can search for the tag you wish to remove (for a Single Connection, only the Tags applied to that connection will appear).

Upon clicking on Remove button, the success toast notification will appear stating the successful removal.