Need help on getting a player removed from an Arraylist through a Listener

Hey, so I am new to programming and I wanted to make a Plugin:
So when u use the command kitpvp you get teleported to a position, get an inventory with a sword in it
and you will get added to an Arraylist.
Question
I want to code that the player is removed from the arraylist fighting when he dies
and made an EventHandler for that but I dont know how to remove the player from the arraylist
cause I don't know how to reach it

Code:

package de.pancake.beginning.commands;


import java.util.ArrayList;


import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;

public class KitPvPCommand implements CommandExecutor, Listener {
    public ArrayList<String> getFighting() {
        return fighting;
    }

    public void setFighting(ArrayList<String> fighting) {
        this.fighting = fighting;
    }

    public ArrayList<String> fighting = new ArrayList<>();

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {;
  
    Player player = (Player)sender;
  
  
            if(sender instanceof Player)  {
                if(args.length == 0) {
                  
              
                    if(!fighting.contains(player.getName())) {
               
                        player.teleport(new Location(Bukkit.getWorld("world"), 0, 69, 0));
                      
                        Inventory inventory = Bukkit.createInventory(null, 9*3, "§6§lKits");
                        ItemStack item = new ItemStack(Material.DIAMOND_SWORD);
                           ItemMeta itemmeta = item.getItemMeta();
                           itemmeta.setDisplayName("§6Sword");
                           itemmeta.addEnchant(Enchantment.DAMAGE_ALL, 1, false);
                           item.setItemMeta(itemmeta);
                           inventory.addItem(item);
                        
                                                player.openInventory(inventory);
                                                fighting.add(player.getName());
  
            }else player.sendMessage("§cYou're already fighting!");
              
              
            
}
          
    }
            return false;      
           }
    // Death
    @EventHandler
    public void onDeath(PlayerDeathEvent death) {
      
      
            }

       }

 

I've tried that but when I test that out ingame it doesn't work and it's still saying "You're already fighting!"

 

Also checking if sender is a Player after casting it thus is kinda putting the cart before the horse, lol

 

Found the issue.
I've had 2 instances of my kitpvp command of my arraylist in the main method:
my fix:

Code:

KitPvPCommand kitpvpCommand = new KitPvPCommand();

getCommand("kitpvp").setExecutor(kitpvpCommand);

PluginManager pluginManager = Bukkit.getPluginManager();
    pluginManager.registerEvents(kitpvpCommand, this);