Welcome to Opt Out, a semi-regular column in which we help you navigate your online privacy and show you how to say no to surveillance. The last column covered how to stop tech companies spying on your phone as Trump promises mass deportations. DNA testing company 23andMe has filed for bankruptcy after months of concern over its financial health and its ability to keep users’ genetic information secure. In light of the uncertainty looming over the company’s future, you should do one thing to protect your privacy today: delete your 23andMe account. If you have used the service to discover…