Fix team assignment bug where other players were removed from the tea…

…m when assigned (#569)

Co-authored-by: Konstantin Raikhert <raikhert13@gmail.com>

adaptive_hockey_federation/main/forms.py

@@ -205,9 +205,6 @@ def save(self, commit=True):
         instance = super().save(commit=False)
         if commit:
             instance.save()
-            instance.team.through.objects.filter(
-                team__in=self.cleaned_data["team"],
-            ).delete()
             instance.team.set(self.cleaned_data["team"])
         return instance