Revert "realtek: Fix failsafe mode"

This reverts commit b7ee0786b56d1088c195fe7c1cdb1ad7d20c9245.

With the previous commit "realtek: remove rtl83xx vlan 1 special cases"
this is no longer required.

Signed-off-by: Thomas Nixon <[email protected]>

target/linux/realtek/base-files/lib/preinit/05_set_preinit_iface_realtek

@@ -1,13 +0,0 @@
-set_preinit_iface() {
-
-	# Create a switch on lan1 to configure the VLAN 1.
-	# Without configuring VLAN ID 1 RTL8380 - RTL9300 will not
-	# forward packets.
-	ip link add name switch type bridge vlan_filtering 1
-	ip link set dev lan1 master switch
-	ip link set lan1 up
-
-	pi_ifname=switch
-}
-
-boot_hook_add preinit_main set_preinit_iface

target/linux/realtek/base-files/lib/preinit/98_remove_preinit_realtek

@@ -1,6 +0,0 @@
-remove_switch() {
-	# delete switch created in 05_set_preinit_iface_realtek again
-	ip link del name switch
-}
-
-boot_hook_add preinit_main remove_switch