Is an interior laundry room without an HVAC vent a code violation?
Although most are based on the National Building Code, code should always be assumed to be local. Pretty much every local regulating body has their own alterations. If you really do care about being in compliance, check with your local Building Inspector or appropriate department. 

The Internet is NEVER the place for the correct answer to "is this code-compliant?", unless you include your municipal web site.