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

This reverts commit 35142b38 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: I94a6b1f4116720cd8abb3448d44d2836751db5aa
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>