Revert "net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime"

This reverts commit bb515c41 which is
commit 579d4f9c upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: Ifc93239dd363a86deab7507780d22f4bc31dddcc
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>