removePopover is used within the Server logic of an app to remove an
existing popover from a Shiny input or output.
removePopover(session, id)The session object passed to function given to shinyServer.
The id of the element to remove the popover from.
See Tooltips_and_Popovers for more information about how to use removePopover with the
rest of the Tooltips_and_Popovers family.
Other Tooltips_and_Popovers: Tooltips_and_Popovers;
addPopover; addTooltip;
bsPopover; bsTooltip;
popify; removeTooltip;
tipify