Remove unused mtag variable.

Obtained from:	Yandex LLC
Sponsored by:	Yandex LLC


git-svn-id: svn+ssh://svn.freebsd.org/base/head@275705 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Remove code related to PACKET_TAG_IPSEC_IN_CRYPTO_DONE mbuf tag.
It isn't used in FreeBSD.

Obtained from:	Yandex LLC
Sponsored by:	Yandex LLC


git-svn-id: svn+ssh://svn.freebsd.org/base/head@275706 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Remove now unused mtag argument from ipsec*_common_input_cb.

Obtained from:	Yandex LLC
Sponsored by:	Yandex LLC


git-svn-id: svn+ssh://svn.freebsd.org/base/head@275707 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f