commit 61cf225053 ("board: gateworks: gw_ventana: use comomn GSC driver")
moved to the common GSC driver and moved remaining board-specific
functions to eeprom.c. The functions in gsc.c are no longer used and it
was removed from the Makefile but the file itself was not removed.
Remove it now.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
d003d89372