Remove extra quote in function comment.
Remove extra quote in function comment.

The extra quote messes up syntax highlighting.

BUG=None
TEST=None

Change-Id: I79168cbdeb49b984fdecc71087b79aae4e7fa18b
Reviewed-on: http://gerrit.chromium.org/gerrit/5304
Reviewed-by: Matt Tennant <46e612415b446ccde19638e4035892001c237942@chromium.org>
Tested-by: Matt Tennant <46e612415b446ccde19638e4035892001c237942@chromium.org>

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