Google's John Mueller responded that it's no problem for Google if you copy a legal disclaimer or privacy policy you used on one of your web sites and gave it to another web site.
John responded to this question on Twitter:
That's no problem
— 🍌 John 🍌 (@JohnMu) November 2, 2018
I mean, think about it, do you want your legal disclaimers to rank well in Google anyway?
Most of these legal disclaimers are boilerplate types of stuff that no one reads anyway.
Forum discussion at Twitter.