Remove HWTests from Autotest experimental bot.
Remove HWTests from Autotest experimental bot.

TEST=Unittests
BUG=None

Change-Id: I72deacda1feb97419b30b35c88ecce61fd01004c

zhang0137/chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,coreos/chromite,coreos/chromite