Revert 188080 "Add vm672-m1 (the new Mac ASan builder) to the li..."

This CL seems to be causing content_unittests flakiness on MAC ASAN Tests (1): http://build.chromium.org/p/chromium.memory/builders/Mac%20ASAN%20Tests%20%281%29/builds/7515/steps/content_unittests/logs/stdio

> Add vm672-m1 (the new Mac ASan builder) to the list of machines using pinned Clang version.
> 
> BUG=170629
> TBR=thakis
> Review URL: https://codereview.chromium.org/12729006

TBR=glider@chromium.org
Review URL: https://codereview.chromium.org/12545038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@188113 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed