Only by manually editing internal program files using the command line. Also,

> You will need to apply these changes after every update to disable collection of usage data. These changes do not survive product updates.

The Feb 2016 release has a new setting that (I believe) persists between updates:

https://github.com/Microsoft/vscode/issues/3182

https://code.visualstudio.com/docs/supporting/faq#_how-to-di...