BEIJING (Reuters) - China's cyber watchdog said on Thursday it has deleted close to 8,000 "malicious" mobile apps, as regulators step up efforts to tighten control over the country's internet.The Cyberspace Administration of China (CAC) said in a statement it had ordered telecom operators to shut down the services of 7,873 apps after finding they had overcharged and cheated users as well as stolen information.It launched the campaign in September with other Chinese government ministries to..