Bumping gaia.json for 1 gaia-central revision(s) a=NPOTB

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https://hg.mozilla.org/integration/gaia-central/rev/80b4004cd338
Author: Ben Kelly <ben@wanderview.com>
Desc: Revert "Merge pull request #12304 from wanderview/contacts-css-opt" r=jmcf

This reverts commit 2216eb383b005b9f6159f2b04fd7400f4f2641af, reversing
changes made to 9043813ee4d5fb68e7dec34dd9cd97d5fc5adcfc.