This has begun failing with the error:
error generating coverage report: write |1: file already closed
I'm not 100% sure what's causing this, but this test isn't actually
covering very much, and trying to test a main function is often fraught
anyway, so it's not worth the hassle.
- switch to "project authors" style copyright. Instead of an AUTHORS
file (https://opensource.google/docs/releasing/authors/), I just list
Google as a major copyright holder in the README.
- use SPDX style license headers in source files
- remove CLA requirement from contributing docs
