Removing Scenes from player menu which are branches to parent section

It sounds like you want the Menu to show the slides for the selected scene but not the other industry scenes. Unfortunately, Storyline doesn't provide a way to alter the built-in Menu while a user is taking a course. (It might be possible with JavaScript, but I can't help with that.) 

You could delete scenes 3-6 from the built-in Menu by editing it in the Player (Customize the Menu in Storyline 360 - E-Learning Heroes (articulate.com) ). That could be confusing for the learner, though, if they see titles for some of the slides they visit, but not all of them. So it might be better to create a custom menu. Or just don't show a slide-by-slide menu at all; simply provide an overview of what's in the course (e.g., Introduction to workplace harassment, industry-specific information, and introduction to sexual harassment).