How can I delete an Arraylist line by entering a data by keyboard?

When you declare the ArrayList<PlayList> songsas an attribute of your class, PlayListit can only be accessed from that same class and not in another, although your solution has been to declare it as staticand invoke it in the class mainthrough the method that applies it

Playlist.addSong

this makes it pointless to declare Playlist playlist=new Playlist();since you never use the object... so why use paradigm POOif you stick to a programming style estructurada, the information that A.cedano gave you in your previous question could well solve and clarify the problems in your code .. and it is that one playListis a set of cancionesand in turn one of those songs has a title, artist, gender, year, etc. You could handle this well in an independent class

public class Cancion{

    private String nombreCancion;
    private String artist;
    private String genre;
    private int year;
    //Contructor
    public Cancion(String nombreCancion,String artist,String genre,int year){
    this.nombreCancion=nombreCancion;
    this.artist=artist;
    this.genre=genre;
    this.year=year;
    }
    //GETTERS AND SETTERS 

    //ToString
    @Override
    public String toString(){
    return "\nNombre de la Cancion: "+nombreCancion+
           "\nArtista: "+artist+
           "\nGenero: "+genre+
           "\nYear: "+year;
    }
}

having the class canciónnow you can generate the class PlayListwhich will have a list of songs

public class Playlist { 
    private ArrayList<Cancion> songs;//lista de canciones
//Inicializa el ArrayList dentro del constructor para que cada nuevo objeto de tu clase PlayList tenga su propia lista de canciones
    public Playlist() {
    this.songs=new ArrayList<>();
    }
  
    public  void addSong(Cancion Cancion) {
        songs.add(Cancion);
    }
//para borrar una `Cancion`necesitaras el nombre de esta y luego iterar la lista donde esta guardada de haber coincidencia usas el metodo remove
    public  void deleteSong(String songName){
        boolean busqueda=false;
        Cancion buscado=null;
        for(Cancion m:songs){
          if(m.getNombreCancion().equals(songName)){
              busqueda=true;
              buscado=m;  
          }
        }
        if(busqueda){
              songs.remove(buscado);
              System.out.println("Cancion eliminada"); }
        else{
            System.out.println("No se encontro la cancion");
        }
    }
//similar al metodo deleteSong()
    public void listSongByArtist(String artist){
         boolean busqueda=false;
         for(Cancion m:songs){
          if(m.getArtist().equals(artist)){
             System.out.println(m);
             busqueda=true;
          }
         }
         if(!busqueda){
             System.out.println("No se encontro al artista");
         }
    }
}

now you only make use of your methods in the classMain

public class Main {
public static void listmenu(){
        System.out.println("1.Add a new song to Playlist");
        System.out.println("2.Delete song from Playlist");
        System.out.println("3.List songs by artist");
        System.out.println("4.List top 5 songs with a specific hastag");
        System.out.println("5.Exit");
    }
 public static void main(String[] args) {
    boolean salida = false;
    int option;
    Scanner sc = new Scanner(System.in);
    Playlist playlist=new Playlist();
    String nombrecancion = null;
    String artista = null;
    String genero = null;
    int popular = 0;
    int any = 0;
    String hastags = null;
    String artistas=null;
    String cancionEliminada=null;

    do {
        listmenu();
        try {
            System.out.print("Please choose an option:");
            option = sc.nextInt();

            switch (option) {
                case 1:
                    System.out.print("SongName?:");
                    sc.nextLine();
                    nombrecancion = sc.nextLine();
                    System.out.print("Artist?:");
                    artista = sc.nextLine();
                    System.out.print("Genre?:");
                    genero = sc.nextLine();
                    System.out.print("Year?:");
                    any = sc.nextInt();
                    playlist.addSong(new Cancion(nombrecancion, artista, genero, any));
                    System.out.println("How popular is this?[1-10]");
                    popular = sc.nextInt();
                    System.out.println("Add some hastags to the song: #w,#y : ");
                    sc.nextLine();
                    hastags = sc.nextLine();
                    System.out.println("You range is " + " " + popular + " And your hastags is " + " " + hastags);

                    break;
                case 2:
                    System.out.println("You choose delete song");
                    System.out.println("enter the song, which you want to delete");
                    sc.nextLine();
                    cancionEliminada =sc.nextLine();
                    playlist.deleteSong(cancionEliminada);
                    break;
                case 3:
                    System.out.println("You choose List songs by artist");
                    System.out.println("Enter an Artist");
                    sc.nextLine();
                    artistas=sc.nextLine();
                    playlist.listSongByArtist(artistas);
                    break;
                case 4:
                    System.out.println("You choose List top 5 songs with a specific hastag");
                    break;
                case 5:
                    salida = true;
                    System.out.println("May the Music be with you");
                    break;
                default:
                    System.out.println("Only numbers from 1 to 5");
            }

        } catch (InputMismatchException e) {
            System.out.println("You need to enter an input");
            sc.next(); // Evitamos que entre en bucle
        }

    } while (!salida);
}}

Additional Mentions

-Make sure that the methods you declare make sense with the class where you declare them

-Use camelCase notation

-name variables with lowercase

-Only use Scanner in the class where your main method will be