By Heather Somerville SAN FRANCISCO (Reuters) – Uber Technologies Inc [UBER.UL] 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. The California Department of Motor Vehicles said on Wednesday it revoked the registration of 16 Uber self-driving cars because they had not been properly permitted. For the last week, the agency was demanding that Uber shut down its program and comply with regulations requiring a permit to test self-driving cars on public roads.