cookies: remove cookies on abort
cookies: remove cookies on abort

Summary:
Whenever cookies are aborted, we need to make sure to remove them from the disk
to avoid polluting it.

Reviewed By: kmancini

Differential Revision: D27691864

fbshipit-source-id: ed16ac9e0ce7a320585cc577201b97255e0aaef7

nodakai/watchman,facebook/watchman,facebook/watchman,facebook/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,facebook/watchman