message: remove slotmigrate in ConfigCmd
diff: @@ -999,10 +999,6 @@ void ConfigCmd::ConfigGet(std::string &ret) {
  ret = "*2\r\n";
  EncodeString(&ret, "daemonize");
  EncodeString(&ret, g_pika_conf->daemonize() ? "yes" : "no");
  - } else if (get_item == "slotmigrate") {
  - ret = "*2\r\n";
  - EncodeString(&ret, "slotmigrate");
  - EncodeString(&ret, g_pika_conf->slotmigrate() ? "yes" : "no");
  } else if (get_item == "dump-path") {
  ret = "*2\r\n";
  EncodeString(&ret, "dump-path");
  @@ -1084,7 +1080,7 @@ void ConfigCmd::ConfigGet(std::string &ret) {
  EncodeString(&ret, "identify-binlog-type");
  EncodeString(&ret, g_pika_conf->identify_binlog_type());
  } else if (get_item == "*") {
  - ret = "*88\r\n";
  + ret = "*86\r\n";
  EncodeString(&ret, "port");
  EncodeInt32(&ret, g_pika_conf->port());
  EncodeString(&ret, "double-master-ip");
  @@ -1121,8 +1117,6 @@ void ConfigCmd::ConfigGet(std::string &ret) {
  EncodeString(&ret, g_pika_conf->suser_blacklist());
  EncodeString(&ret, "daemonize");
  EncodeInt32(&ret, g_pika_conf->daemonize());
  - EncodeString(&ret, "slotmigrate");
  - EncodeInt32(&ret, g_pika_conf->slotmigrate());
  EncodeString(&ret, "dump-path");
  EncodeString(&ret, g_pika_conf->bgsave_path());
  EncodeString(&ret, "dump-expire");
  @@ -1181,12 +1175,11 @@ void ConfigCmd::ConfigGet(std::string &ret) {
  void ConfigCmd::ConfigSet(std::string& ret) {
  std::string set_item = config_args_v_[1];
  if (set_item == "*") {
  - ret = "*20\r\n";
  + ret = "*19\r\n";
  EncodeString(&ret, "loglevel");
  EncodeString(&ret, "timeout");
  EncodeString(&ret, "requirepass");
  EncodeString(&ret, "masterauth");
  - EncodeString(&ret, "slotmigrate");
  EncodeString(&ret, "userpass");
  EncodeString(&ret, "userblacklist");
  EncodeString(&ret, "dump-prefix");
  @@ -1232,9 +1225,6 @@ void ConfigCmd::ConfigSet(std::string& ret) {
  } else if (set_item == "masterauth") {
  g_pika_conf->SetMasterAuth(value);
  ret = "+OK\r\n";
  - } else if (set_item == "slotmigrate") {
  - g_pika_conf->SetSlotMigrate(value);
  - ret = "+OK\r\n";
  } else if (set_item == "userpass") {
  g_pika_conf->SetUserPass(value);
  ret = "+OK\r\n";
  