Revert "cbuildbot: enable deduping of uploaded symbols"
Revert "cbuildbot: enable deduping of uploaded symbols"

This reverts commit bbb594bee0ad61c67ff960ce7641750324c07211.

This is too flaky even for ToT atm, so turn it off until we can
track down the various hangs.

BUG=chromium:355843
TEST=`./buildbot/run_tests` pass

Change-Id: I680cd54f974bb34285ce1d60a14b5f297786fb9d
Previously-Reviewed-on: https://chromium-review.googlesource.com/198250
Reviewed-on: https://chromium-review.googlesource.com/199331
Commit-Queue: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Tested-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Reviewed-by: Yu-Ju Hong <52dc720c411f8e2156e608c1a8b894a917489667@chromium.org>

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