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

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https://hg.mozilla.org/integration/gaia-central/rev/d30cececbb29
Author: Julien Wajsberg <felash@gmail.com>
Desc: Revert "Merge pull request #11564 from lightsofapollo/travis-mc"

This reverts commit 52590b803ae2f40b1d89885808282706480495e7, reversing
changes made to 2d1a22ba93f044c74b08b3298f8a452bcd860fff.