Hiding Bracket on One Staff of Grand Staff

I have an arrangement I am putting together that utilizes a grand staff as a sort of sketch. Much of the time only one staff is needed and when I hide the second staff there is a little mini bracket indicating that it is a single staff of a grand staff. Is there some way I can hide this so when it is by itself it looks like a single line staff?

That setting is under Layout Options–Brackets and Braces.

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There it is. Thank you!