Remove unwanted instruments in setup

In the screenshot you can see that the score is only for saxes. In setup though, I have three flutes listed which I do not want. I have tried to delete in setup but they do not go away. I originally had the three flutes but I don’t want them now. The parts in the score disappeared when I used delete , but not the headings in setup.
is there a way to remove these three flute headings?

Many thanks.

Select the players you want to remove, then click the rubbish bin icon (bottom right of the left hand panel). A warning dialog will appear allowing you to confirm deletion.

Hi Janus.
I was clicking delete player and nothing happened. When I click delete player and part then it did delete the player.

Many thanks for your help.
Take Care