Remove cachepath from tryserver.chromium.perf
Remove cachepath from tryserver.chromium.perf

Recent RietveldPoller changes removed that parameter.

TBR=tonyg

BUG=334892

Review URL: https://codereview.chromium.org/342643002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@277938 0039d316-1c4b-4281-b951-d872f2087c98

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