openbmc-machines: Remove unncessary CONFIG_HWMON

CONFIG_HWMON is implied by the drivers that use it, so we do not need to
specify it in the defconfigs.

Change-Id: I1c6e8679412f80dc0db69ef0f72a9c73e8602fb9
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/meta-barreleye/recipes-kernel/linux/linux-obmc/barreleye.cfg b/meta-barreleye/recipes-kernel/linux/linux-obmc/barreleye.cfg
index 053fea3..f778394 100644
--- a/meta-barreleye/recipes-kernel/linux/linux-obmc/barreleye.cfg
+++ b/meta-barreleye/recipes-kernel/linux/linux-obmc/barreleye.cfg
@@ -1,4 +1,3 @@
-CONFIG_HWMON=y
 CONFIG_SENSORS_NCT7904=y
 CONFIG_SENSORS_LM75=y
 CONFIG_EEPROM_AT24=y