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>
15 jobs for slow-autobuild in 204 minutes and 50 seconds (queued for 6 seconds)
Status Name Job ID Coverage
  Build
passed build_ctdb #80731210
docker shared

00:23:17

passed build_others #80731212
docker shared

00:13:30

passed build_samba #80731213
docker private

03:24:50

passed build_samba_ad_dc #80731217
docker private

01:06:38

passed build_samba_ad_dc_2 #80731203
docker shared

00:30:17

passed build_samba_ctdb #80731211
docker shared

00:36:14

passed build_samba_fileserver #80731215
docker private

00:18:16

passed build_samba_libs #80731205
docker shared

00:35:44

passed build_samba_none_env #80731196
docker shared

00:50:10

passed build_samba_nopython #80731197
docker shared

00:26:18

passed build_samba_nt4 #80731214
docker private

00:33:46

passed build_samba_o3 #80731201
docker shared

00:38:02

passed build_samba_static #80731208
docker shared

00:50:30

passed build_samba_systemkrb5 #80731198
docker shared

00:18:36

passed build_samba_xc #80731199
docker shared

00:07:04