Hello. I spawned a signal smoke effect but I have no idea how to remove it....Can anyone help me with it? Thanks!

private void SpawnEffect(Vector3 Position)
        {
            Effect.server.Run("assets/bundled/prefabs/fx/smoke_signal_full.prefab", Position);
        }​

Try this

using System.Linq;
namespace Oxide.Plugins
{
    [Info("Kill Effect", "bsdinis", "0.0.1")]
    class KillEffect : RustPlugin
    {
        [ChatCommand("ke")]
        void KE(BasePlayer player, string command)
        {
            if (!player.IsAdmin)
            {
                player.ChatMessage($"Unknown command: {command}");
                return;
            }
            foreach (BaseEntity entity in BaseNetworkable.serverEntities.ToList())
            {
                if (entity == null || UnityEngine.Vector3.Distance(player.transform.position, entity.transform.position) > 5f || entity.PrefabName != "assets/bundled/prefabs/fx/smoke_signal_full.prefab") continue;
                player.ChatMessage($"Killed {entity}");
                entity.Kill();
            }
        }
    }
}​

Merged post

Run the chat command /ke while standing 5 meters away or less from the smoke effect.

del assets/bundled/prefabs/fx/smoke_signal_full.prefab​

to kill it if just trying to remove it non via plugin