SAN FRANCISCO, Dec 21 Uber Technologies Inc has removed its self-driving cars from San Francisco streets, halting the autonomous program one week after its launch as the company faced a regulatory crackdown. TAIPEI, Dec 22 Taiwan stocks fell on Thursday tracking losses in overseas markets and ahead of the island’s last rate review for the year in which the central bank is expected to keep the key policy rate unchanged, but would provide its outlook for 2017.