feat(controller): clusterconfig-schema-split task 2.3 — remove dead port defaulting

Removes SET_DEFAULT_IF_UNSET(c->port, 0, 9990) from fill_default_cluster_config()
in myconf.c and config_repl.c, now dead since cluster_config_t.port was removed
in task 1.2 and cluster_open_listener stopped reading it in task 2.1. All of
src/controller/{cluster,myconf,config_repl}.c now compile clean.

.kiro/specs/clusterconfig-schema-split/tasks.md

@@ -45,7 +45,7 @@
   - _Depends: 1.2_
   - _Boundary: Debug-Dump Component (cluster.c)_
 
-- [ ] 2.3 Remove the now-dead `ClusterConfig` port defaulting in `myconf.c` and `config_repl.c`
+- [x] 2.3 Remove the now-dead `ClusterConfig` port defaulting in `myconf.c` and `config_repl.c`
   - Delete the `SET_DEFAULT_IF_UNSET(c->port, 0, 9990)` call in `myconf.c`
   - Delete the equivalent `SET_DEFAULT_IF_UNSET(c->port, 0, 9990)` call in `config_repl.c`
   - Observable: `myconf.c` and `config_repl.c` compile without referencing `cluster_config_t`'s `port` member

src/controller/config_repl.c

@@ -584,7 +584,6 @@ static void *s_probe_ssl_ctx = NULL;
 
 static void fill_default_cluster_config(cluster_config_t *c)
 {
-    SET_DEFAULT_IF_UNSET(c->port, 0, 9990);
     SET_DEFAULT_IF_UNSET(c->heartbeat_interval, 0, 5);
     SET_DEFAULT_IF_UNSET(c->fetch_job_interval, 0, 10);
 }

src/controller/myconf.c

@@ -71,7 +71,6 @@ static int cluster_hook_fun(int type, int situation, int detail, void* data,
 
 static void fill_default_cluster_config(cluster_config_t* c)
 {
-    SET_DEFAULT_IF_UNSET(c->port, 0, 9990);
     SET_DEFAULT_IF_UNSET(c->heartbeat_interval, 0, 5);
     SET_DEFAULT_IF_UNSET(c->fetch_job_interval, 0, 10);
 }