Removing secondary links

How would one go about removing some of the child links that show up in the navigaion bar? I would like to remove links like "whats new" and some others that show up on some addons like the portal addon etc.

What would be the best way to do this? Adding display: none; to extra css? I would prefer not to edit templates really.

Could anyone point me in the right direction?

Cheers, Ace.