ft2232_spi: remove unused print_supported_usbdevs() function

BUG=b:145175076
BRANCH=master
TEST=flashrom works as usual with servo v2

Change-Id: I023767c0cf991ef72dda2716843fee29c1a5aeec
Signed-off-by: Nikolai Artemiev <nartemiev@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/flashrom/+/2049143
Commit-Queue: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
2 files changed