Jim mentioned that a senior council wizard who did the equivalent of bringing in truckloads of tnt could emulate the nuke that is a deathcurse. So anyone with the magical mojo of a senior council member can probably make something that could destroy it.
He also talked about Mab being able to remove a hunger spirit messily.
A death curse is a ritual with a certain level of power. If it's a 17 difficulty ritual then a 17 ritual spell could probably tear it out, with you taking 17 damage in backlash.
You can also try to technically fulfill the curse.