Can a university revoke my degree for not attending classes? I have a 60 hour work-week due to work/school/commuting/homework, so I've had to make sacrifices -- usually this is attendance of mindless gen-ed classes. I'm worried that the university may revoke my degree if this comes to light. 

Described in the answers to this question, a university can revoke a degree if it is found that the student broke the code of conduct during the course of the program. My university's code of conduct specifies that it is up to the instructor to determine attendance policies, and AFAIK none of the classes I have skipped had clauses that resulted in a failure of the class due to poor attendance (just grade penalties). Despite this, would it be unprecedented for the university to claim I was in violation of an attendance policy anyway and revoke my degree? I'm worried the school may see this as an insult and retaliate. 

If it matters which classes and how severe, I skipped 50% of Physics II and only attended 4 days of Calc II (test days). I plan to do the same with Chem I this semester. I was not at risk of failing the courses. I am pursuing a bachelors degree of Computer Science at a US university. I have never broken any laws or cheated. I am in good academic standing and on-track to graduate at the end of the semester.
It is part of the cultural norms of American universities that your attendance or lack thereof is an issue for each individual course instructor to pursue or not pursue as they choose.  At my university the administration is involved precisely insofar as to have the following policy:


  Students are expected to attend classes regularly. A student who incurs an excessive number of absences may be withdrawn from a class at the discretion of a professor. 


This states the situation well: the administration empowers the instructor to penalize the student for poor attendance, including withdrawing them from the course. Thus whether and how your lack of attendance in a course is problematic is between you and the instructor of that course.  You seem to be worried about attendance that is acceptable to the instructor -- more precisely, not resulting in failure or withdrawal -- but is somehow unacceptable to the university as a whole, since you write


  Despite this, would it be unprecedented for the university to claim I was in violation of an attendance policy anyway and revoke my degree? I'm worried the school may see this as an insult and retaliate. 


In a word: yes, this would be completely unprecedented and moreover implausible.  First of all, how does the university even know about your attendance?  Even if they somehow found out (maybe you write an editorial in your school paper advocating attending class as little as possible?!?) it would widely be viewed as a violation of the instructor's rights to penalize you for lack of attendance when the instructor did not.  Finally, you speak of a degree being revoked which means that first you get it and then they take it away from you.  Degrees are only revoked for the grossest forms of academic misconduct.  It would be outrageous for a university to revoke a degree due to lack of attendance -- frankly, that would reflect very badly on them and would invite censure and possibly even legal action, as it seems manifestly unfair to conjure requirements retroactively.  

Summing up: you should clear your attendance plans with each course instructor in advance.  To do otherwise is really not safe, as you can see that e.g. my university (which is not so far away from yours) empowers me to withdraw a student for sufficiently poor attendance.  If your attendance plan is okay with the instructor, it will be okay with everyone else too.