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

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https://hg.mozilla.org/integration/gaia-2_0/rev/d2a2db96235d
Author: Ed Morley <emorley@mozilla.com>
Desc: Revert "Merge pull request #21909 from crh0716/1038496"

This reverts commit aeb80a140fd2c29a62298658071d0ccb20063307.
Bumping manifests a=b2g-bump