Remove weird comment about attractiveness

This is out of place and borderline inappropriate. There's really no
need to reference physical appearance here, so how about we just don't.

code-review/README.md

@@ -13,7 +13,7 @@ Everyone
 * Ask for clarification. ("I didn't understand. Can you clarify?")
 * Avoid selective ownership of code. ("mine", "not mine", "yours")
 * Avoid using terms that could be seen as referring to personal traits. ("dumb",
-  "stupid"). Assume everyone is attractive, intelligent, and well-meaning.
+  "stupid"). Assume everyone is intelligent and well-meaning.
 * Be explicit. Remember people don't always understand your intentions online.
 * Be humble. ("I'm not sure - let's look it up.")
 * Don't use hyperbole. ("always", "never", "endlessly", "nothing")