Remove --trace argument from repo sync command. This is no longer needed.
Remove --trace argument from repo sync command. This is no longer needed.

BUG=chromium-os:13012
TEST=Run unit tests.

Change-Id: I75943d13da1c8ee04a7a663ad3117cb1c7390567

R=sosa@chromium.org,anush@chromium.org

Review URL: http://codereview.chromium.org/6708062

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