Removed useless FAQ file

doc/FAQ

@@ -1,28 +0,0 @@
-====== Frequently Asked Questions ======
-
-> Q: Can I use my USB drive as usual ?
->> A: Yes. pam_usb only occupies a few kilobytes of the device's space.
-
-> Q: What if I lose or break my USB key ? Will I be able to log back in ?
->> A: Sure. Your usual password will be asked.
-
-> Q: How is the USB key identified ?
->> A: The USB device is both identified by its manufacturer attributes (vendor,
-product, serial number) and by a few random bytes called one time pads that
-pam_usb writes and updates on the USB device upon authentication.
-
-> Q: What if someone copies the content of my flash drive ? Will she/he be able
-to log into my account ?
->> A: Even if that person manages to fake your device's attributes (vendor,
-product, serial number, UUID), the one time pad they copied will be outdated as
-soon as you authenticate.
-
-> Q: Is my USB drive compatible with pam_usb ?
->> A: About every USB flash drive will work with pam_usb.
-
-> Q:  I can't authenticate anymore, pam_usb gives me the following error: Pad
-checking failed. What should I do ?
->> A: It's a machine/device synchronization issue. To get rid of that error you
-have to reset the pads of your system by removing the .pamusb folder located on
-your home (/root/.pamusb/, /home/foobar/.pamusb/, etc).
-