Remove swarm_cleanup.py, it was moved to trunk/tools/swarm_client/tools.
Remove swarm_cleanup.py, it was moved to trunk/tools/swarm_client/tools.

TBR=csharp@chromium.org
BUG=


Review URL: https://chromiumcodereview.appspot.com/11040039

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@160135 0039d316-1c4b-4281-b951-d872f2087c98

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