linux defconfig: Remove SCSI Tape, NETCONSOLE, TUN/TAP, VIRTIO-NET

All unused and just wasting precious BOOTKERNEL space.

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
diff --git a/openpower/configs/linux/skiroot_defconfig b/openpower/configs/linux/skiroot_defconfig
index 6a75e08..567763e 100644
--- a/openpower/configs/linux/skiroot_defconfig
+++ b/openpower/configs/linux/skiroot_defconfig
@@ -77,7 +77,6 @@
 CONFIG_EEPROM_AT24=y
 # CONFIG_CXL is not set
 CONFIG_BLK_DEV_SD=m
-CONFIG_CHR_DEV_ST=m
 CONFIG_BLK_DEV_SR=m
 CONFIG_BLK_DEV_SR_VENDOR=y
 CONFIG_CHR_DEV_SG=m
@@ -121,9 +120,6 @@
 CONFIG_DM_MIRROR=m
 CONFIG_DM_ZERO=m
 CONFIG_DM_MULTIPATH=m
-CONFIG_NETCONSOLE=m
-CONFIG_TUN=m
-CONFIG_VIRTIO_NET=m
 CONFIG_ACENIC=m
 CONFIG_ACENIC_OMIT_TIGON_I=y
 CONFIG_TIGON3=y
@@ -143,6 +139,7 @@
 CONFIG_QLGE=m
 CONFIG_NETXEN_NIC=m
 CONFIG_SFC=m
+# CONFIG_USB_NET_DRIVERS is not set
 # CONFIG_WLAN is not set
 CONFIG_INPUT_EVDEV=y
 CONFIG_INPUT_MISC=y