s3: messaging: remove unused messaging_init_client()

Bug: https://bugzilla.samba.org/show_bug.cgi?id=13465

Signed-off-by: Ralph Boehme <slow@samba.org>
18 jobs for slow-autobuild2 in 288 minutes and 27 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Build
passed #80758334
docker shared
build_ctdb

00:21:10

passed #80758339
docker shared
build_others

00:13:21

passed #80782428
private docker
build_samba

03:22:25

passed #80758346
docker private
build_samba_ad_dc

01:02:48

passed #80758331
docker shared
build_samba_ad_dc_2

00:32:49

passed #80777844
shared docker
build_samba_ctdb

00:35:32

passed #80758345
docker private
build_samba_fileserver

00:14:57

passed #80758332
docker shared
build_samba_libs

00:35:36

passed #80758326
docker shared
build_samba_none_env

00:47:22

passed #80758327
docker shared
build_samba_nopython

00:27:48

passed #80758344
docker private
build_samba_nt4

00:30:36

passed #80758330
docker shared
build_samba_o3

00:33:04

passed #80758333
docker shared
build_samba_static

00:49:51

passed #80759697
shared docker
build_samba_systemkrb5

00:22:55

passed #80758329
docker shared
build_samba_xc

00:06:49

failed #80758342
docker private
build_samba

01:21:21

failed #80758336
docker shared
build_samba_ctdb

00:35:50

failed #80758328
docker shared
build_samba_systemkrb5

00:01:42