nav2_rviz_plugins: Don't use non-existent slot#5016

SteveMacenski merged 1 commit intoros-navigation:mainros-navigation/navigation2:mainfrom

wentasah:nav2_rviz_plugins-fix-slot-warningwentasah/navigation2:nav2_rviz_plugins-fix-slot-warningCopy head branch name to clipboard