[eme] Cleanup: remove unnecessary log div and video ID from Google tests

[ddorwin]

See https://chromium.googlesource.com/chromium/src/+/5b261b31c00483ce80be18827caa1f3806bfab1e%5E%21/. Since the tests are in the process of being migrated, upstreaming will not work and we should just search and replace once all the tests have been migrated.