If you wish to delete your account, open your game profile:
Then, select "Profile" -> "Profile information" -> "Edit":
Afterwards, use the "Delete account" option:
In case you decide to restore it, you will need to use the recovery letter emailed to you after the account removal.
You may remove the application from your Facebook profile page. Your gaming data and account are linked to your Facebook profile whilst your data is stored on a secure server. This information is retained so that in the future, if you choose to play again you will be returned to your original gaming location with all of the achievements you had previously earned.
There is no way to delete this information unless you also delete your Facebook account.
It is also worth saying that it is technically impossible to delete a game account from the Global map.