You can't, those are coded into CB Menu. The only way to remove them is hide them using CSS, a custom plugin to modify the menu array, or modify CB Menu code so the link isn't added. CSS is probably the quickest and easiest approach. To find a menu items ID/Classes right click in Chrome or Firefox and click Inspect Element on the menu item. You can then use CSS to get rid of it, example as follows.
Code:
.cbMenu_UE_MENU_MANAGEMYCONNECTIONS {
display: none !important;
}