message: build: remove obsolete comment in `env.sh`
  The comment is no longer true since
  PR Close
diff: @@ -36,8 +36,6 @@ fi
  setEnvVar NODE_VERSION 10.9.0
  setEnvVar YARN_VERSION 1.9.2
  -# Pin to a Chromium version that does not cause the aio e2e tests to flake. (See https://github.com/angular/angular/pull/20403.)
  -# Revision 494239 (which was part of Chrome 62.0.3186.0) is the last version that does not cause flakes. (Latest revision checked: 508578)
  setEnvVar CHROMIUM_VERSION 561733 # Chrome 68 linux stable, see https://www.chromium.org/developers/calendar
  setEnvVar CHROMEDRIVER_VERSION_ARG "--versions.chrome 2.41"
  setEnvVar SAUCE_CONNECT_VERSION 4.4.9
  