libpayload: Remove file I/O.c

Read_buf_from_file() and write_buf_to_file() use file streams which are
not supported in libpayload.

Corresponding to flashrom svn r1730.

Signed-off-by: Nico Huber <nico.huber@secunet.com>
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
1 file changed