Revert "netfilter: nft_ct: fix use after free when attaching zone template"

This reverts commit 2c3c5ea3 which is
commit 34243b9e 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: I8f15def390c39b2efedd7a58ead8748d1326410e
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>