Hi morph208,
Are you still having this same error? As your cook warnings all seem to be related to assets you’re not using, and the fix up redirects aren’t catching the problem, please see the answer on this AnswerHub thread where a user was seeing the same error as yours, and give his fix a try. Please make sure to make a copy of your project on which to test this fix.
While you have a copy made, you might try upgrading to the latest preview for the 4.8 build and see if any fixes have gone in that might fix your specific issue.
Thanks!