cleanup: remove board_discharge_on_ac() unless custom func needed

Remove duplicate board_discharge_on_ac() functions and create
CONFIG_CHARGER_DISCHARGE_ON_AC_CUSTOM for boards that have a
unique implementation of board_discharge_on_ac().

BUG=chrome-os-partner:42294
BRANCH=none
TEST=make -j buildall.
load on samus and test 'ectool chargecontrol discharge' forces
discharging on AC, and 'ectool chargecontrol normal' resumes normal
charging.

Change-Id: I2b7c04b9278d07748d6d41798ceab1a7e90684e4
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/284911
Reviewed-by: Randall Spangler <rspangler@chromium.org>

1 files changed, 0 insertions, 23 deletions

diff --git a/board/lucid/board.c b/board/lucid/board.c
index fc83e71c7a..c9ae07c65d 100644
--- a/board/lucid/board.c
+++ b/board/lucid/board.c
@@ -145,26 +145,3 @@ enum battery_present battery_is_present(void)
 {
 	return gpio_get_level(GPIO_BAT_PRESENT) ? BP_YES : BP_NO;
 }
-
-static int discharging_on_ac;
-
-/**
- * Discharge battery when on AC power for factory test.
- */
-int board_discharge_on_ac(int enable)
-{
-	int rv = charger_discharge_on_ac(enable);
-
-	if (rv == EC_SUCCESS)
-		discharging_on_ac = enable;
-
-	return rv;
-}
-
-/**
- * Check if we are discharging while connected to AC
- */
-int board_is_discharging_on_ac(void)
-{
-	return discharging_on_ac;
-}