Silvertones has the winning answer in my opinion.
Why save those tracks as BB tracks to begin with? Erase/Remove them once (and save), or scroll every time you open the project.

Yeah you can hide them, but they are still there .. possibly firing up an instance of a synth, or saving unneeded data. Quick n Easy to just be gone with them right away. Once you click the magic button Silvertones mentioned they are just empty tracks. You can easily remove them using the Tracks drop down.
You can also move everything up if you want, and re-arrange it using the Track Swap feature.

I like a neat comfy project.
Click track on Track 1.
Stuff like that.. a little attention to detail and the project feels much more comfortable for me.

Make your sound your own!
.. I do not work here, but the benefits are still awesome