How to remove immunity to fear?

[Bluydee]

I'm playing a character using sneak attack and I have immunity to fear from a template. This, of course, renders me unable to use Craven, which is a big blow to my damage. Is there anyway to remove any immunity to fear you have?

[Vaz]

Ability Rip or Trait Removal, depending on whether it is Su or Ex.

[Cowardly Griffo]

Ask your DM to let you drop it from the template instead of jumping through silly RAW hoops.