Remove f_chromium_win_clang_goma.
Remove f_chromium_win_clang_goma.

I should have removed this in r294510, however, I've forgot to remove.
Any bot is not using this factory.

BUG=452797

Review URL: https://codereview.chromium.org/1025253002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@294526 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build