Remove duplicated [file] from usage help

A file is already specified directly in conjunction for -r/-w/-v.

Corresponding to flashrom svn r628.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
2 files changed