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

This reverts commit 8984bcbd 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: Ie3ab1ea9d52707a5ab54da066a350643f1feed70
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>