Drop obsolete unused slave.
Drop obsolete unused slave.

BUG=None
TEST=None
TBR=dba@chromium.org

Review URL: https://codereview.chromium.org/1692613002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@298744 0039d316-1c4b-4281-b951-d872f2087c98

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