Those links automatically appear there depending on how you have Open Graph Actions setup on your page. Per Facebooks requirements, there has to be some way for a user to disable and/or delete actions they've posted to their Timeline. If you're going to remove those links, make sure there is some other way for a user to see and edit their history.
As for the edits to make, those links are in the /plugins/system/jfbcsystem.php file. Around line 145, you'll see:
$htmlTag = '<a href="' . JRoute::_('index.php?option=com_jfbconnect&view=opengraph&layout=activity') . '">' . JText::_('COM_JFBCONNECT_TIMELINE_ACTIVITY_LINK') . '</a>';
$htmlTag .= '<br/><a href="' . JRoute::_('index.php?option=com_jfbconnect&view=opengraph&layout=settings') . '">' . JText::_('COM_JFBCONNECT_TIMELINE_CHANGESETTINGS') . '</a>';Edit away!
I hope that helps,
Alex