I have been annoyed with this and kept it to myself, so when somebody else asks for this I take the time to write this.
Please allow a setting that lets us turn this message off! I typically never want to delete it, stop asking me!

Now on the flip side, I love this message below, dont turn this one off when you delete it from the right pane.

I agree, please dont ask to delete the takeoff when deleting from the drawing mode. Only if I delete from the takeoff pane.
I agree as well
Thanks for the feature request Kyle! We'll add a user setting to enable/disable this prompt.