Please notice that there's no way to just delete the DLC separately at this time. For instructions on how to re install your download please follow the next instructions:
- Delete the game you want to install DLC from your HDD
- To reinstall the game, return to the install list in notifications and select the failed install.
- Boot you game and install any updates.
I know how to do this, its long winded and you wouldn't expect it to be there but:
go settings > application saved data > saved data in system storage > delete > call of duty ghosts
a list of things come up, game save, profile and dlc etc
should solve it