def uninstall
      plugin = Heroku::Plugin.new(shift_argument)
      validate_arguments!
      if Heroku::Plugin.list.include? plugin.name
        action("Uninstalling #{plugin.name}") do
          plugin.uninstall
        end
      else
        Heroku::JSPlugin.uninstall(plugin.name)
      end
    end
def uninstall
      plugin = Heroku::Plugin.new(shift_argument)
      validate_arguments!
      if Heroku::Plugin.list.include? plugin.name
        action("Uninstalling #{plugin.name}") do
          plugin.uninstall
        end
      else
        Heroku::JSPlugin.uninstall(plugin.name)
      end
    end
plugins:uninstall PLUGIN

 uninstall a plugin

Example:

 $ heroku plugins:uninstall heroku-production-check
 Uninstalling heroku-production-check... done