Ah, I get it now. You created a profile with only a FamilySearch family tree profile as a source, and you were hoping to get rid of the profile you created.
We don't delete profiles here. 
Fortunately, there are some OK sources cited on that profile you cited. You should be able to visit the FamilySearch profile that you added as a source, access the good sources that are cited in that profile, and add those good sources to the pre-1700 profile(s) that you created.
You may even find it easier to fix your error than to beg forgiveness for it. And I suggest that you quit creating profiles (for any time period) that only cite user-contributed family trees, so this will never happen again.