serial: remove nulldev_serial_input
nulldev_serial_input is static and not used in this file, so remove it. Signed-off-by:Heiko Schocher <hs@denx.de> Reviewed-by:
Simon Glass <sjg@chromium.org>
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nulldev_serial_input is static and not used in this file, so remove it. Signed-off-by:Heiko Schocher <hs@denx.de> Reviewed-by:
Simon Glass <sjg@chromium.org>