Short Answer: Most likely, 'Yes', provided Six (x6) Generation follow-on ...
I am working on the premise that ONE wayward individual/person has been added to your "Ancestral" lines [As; we DO NOT have a 'Tree" on "Family Tree" of 'FamilySearch' - we ONLY have "Branches" (ie. "Ancestral" lines), that are interconnected, in this SINGLE "One" World "Tree", for all of us, that is "Family Tree" of 'FamilySearch'.
And, from that ONE wayward individual/person, another Six (x6) generations follow-on from them.
IF, that is the case; THEN, 'Yes', you can "Remove" that ONE wayward individual/person; and, the other Six (x6) generations that follow-on from them will also be "Removed".
Depending on, where; and, how, that ONE wayward individual/person is connected to your "Ancestral" lines [ ie. Part of a "Couple" Relationship; or, as a Child in a Family as part of "Patent-Child" Relationship ] they can be "Removed".
That said ...
You need to be careful/vigilant, that ONE wayward individual/person may have been added to your "Ancestral" lines through a "Merge"/"Combine".
IF, that is the case; THEN, that can be a little more complicated; and, need through investigation/consideration, before taking any action.
If you have any further 'Questions' please do not hesitate to ask.
We would need to know the actual details before giving any specific advice.
IF, you are willing; THEN, you could provide the 'FamilySearch Person Identifier' (PID) of that ONE wayward individual/person, with the details of what the problem/issue is; and, we could take a look and advise you further - the choice is yours.
I hope this helps.
Thank you, Brett. I will investigate further before I take any action then.