Still not the best idea. Here are your options and how they could play out:
1. Retake the course
a. Get an A -> adcom says, "Well yeah, I'd expect him/her to get an A after already having seen the material once before."
b. Get anything other than an A -> adcom says, "What's wrong with this person that s/he can't get an A even after having essentially seen the answer key?"
2. Take an easier course
a. Get an A -> adcom says, "An A. Cool."
b. Get anything less than A (but still at least C) -> adcom says, "A (fill in grade here). Cool."
So with the first option (retaking the course) the BEST that can happen is that you break even. It offers you absolutely no advantage over taking something else because there's the expectation of an A on the retake.
To answer your question: retaking and getting an A won't hurt you, but it also offers no advantage (and has considerable downside if you somehow don't get an A). So you'd just be taking on additional risk with no hope of reward. To quote the wise Goro: