Siri co-founder and CEO Dag Kittlaus has left Apple, according to a new report. Citing anonymous sources, AllThingsD reports that Kittlaus made the move—which was both amicable and planned for ahead of time—due to his family still residing in Chicago, a desire to take some time off, and an interest in new entrepreneurial ideas. Kittlaus led Apple’s internal speech recognition efforts since the company acquired Siri in April 2010,…