Revert "vlan: Fix VLAN 0 memory leak"

Revert "vlan: Fix VLAN 0 memory leak"

This reverts commit 718cb09aaa6fa78cc8124e9517efbc6c92665384.

The commit triggers multiple syzbot issues, probably due to possibility of
manually creating VLAN 0 on netdevice which will cause the code to delete
it since it can't distinguish such VLAN from implicit VLAN 0 automatically
created for devices with NETIF_F_HW_VLAN_CTAG_FILTER feature.

Reported-by: [email protected]
Closes: https://lore.kernel.org/all/[email protected]/
Reported-by: [email protected]
Closes: https://lore.kernel.org/all/[email protected]/
Reported-by: [email protected]
Closes: https://lore.kernel.org/all/[email protected]/
Fixes: 718cb09aaa6f ("vlan: Fix VLAN 0 memory leak")
Signed-off-by: Vlad Buslov <[email protected]>
Reviewed-by: Ido Schimmel <[email protected]>
Signed-off-by: David S. Miller <[email protected]>