That clause doesn't apply because we're talking about an additional restriction, not an additional permission.
But, same result, because it also says:
> If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term.
A restriction stating "you must keep branding" can be ignored. What you can require, is attribution.
But, same result, because it also says:
> If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term.
A restriction stating "you must keep branding" can be ignored. What you can require, is attribution.