Without a press release, Apple has quietly released an unusually stripped-down 16GB version of the fifth-generation iPod touch, eliminating the rear iSight camera and loop wrist strap found in the previously-released 32GB and 64GB models. The new 16GB iPod touch retains the other specifications of the late 2012 models, but is available solely in a silver and white color combination, selling for $229 with packed-in EarPods earphones. It is two grams…