contrib/completion: remove --oom-score-adj daemon flag

This flag was deprecated in docker v24.0, and no longer functional
since v25.0; fully removed in v26.0, so we can remove the docs
for this.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

contrib/completion/bash/docker

@@ -2591,7 +2591,6 @@ _docker_daemon() {
 		--mtu
 		--network-control-plane-mtu
 		--node-generic-resource
-		--oom-score-adjust
 		--pidfile -p
 		--registry-mirror
 		--seccomp-profile

contrib/completion/zsh/_docker

@@ -2770,7 +2770,6 @@ __docker_subcommand() {
                 "($help)--max-concurrent-uploads[Set the max concurrent uploads]" \
                 "($help)--max-download-attempts[Set the max download attempts for each pull]" \
                 "($help)--mtu=[Network MTU]:mtu:(0 576 1420 1500 9000)" \
-                "($help)--oom-score-adjust=[Set the oom_score_adj for the daemon]:oom-score:(-500)" \
                 "($help -p --pidfile)"{-p=,--pidfile=}"[Path to use for daemon PID file]:PID file:_files" \
                 "($help)--raw-logs[Full timestamps without ANSI coloring]" \
                 "($help)*--registry-mirror=[Preferred registry mirror]:registry mirror: " \