
Arsenal has a really looong list to send from the team this summer as it seems...
Honestly nearly all of them are really useless for the squad. Trossard can actually be useful as a substitute after revolutionizing the team. He can bring critical points to his team sometimes with his nice individual skills.

This is a good way to raise funds by the way. They spent a lot of money earlier on some solid players such as Rice and so on. Now they should make sure there won't be any issues with FFP too while spending a huge amount on a new striker probably.
These players in your list are actually the players Arsenal should sell to raise money but Trossard, Fabio Vierra, and Thomas Partey should be considered in the team because Trossard is more important than Martinelli in this current Arsenal squad, while Thomas Partey is the just important player in Arsenal’s defensive midfield right now, he used to play as a right back when someone Arsenal’s defenders are injured and he has survive this season so far without any injury; he deserve to be given contract extension and the team should focus on attacking line not the defensive midfield line because they have the best defensive midfielders in the Premier League as we speak and they also have Merino, and Rice that are still good for the team.
However, the likes of Kiwior, Sterling, Jorginho, and others should be let go, but I also think Nelson should be given a chance because he has been doing really well in his loan spell. Furthermore, Zinchenko, Tomiyasu, Nuno Tavares, and Sambi Lokonga should just be sell to raise money for the team to sign more money payers that help the team win trophies next season.