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

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https://hg.mozilla.org/integration/gaia-2_0/rev/1243245c8573
Author: Salvador de la Puente <salva@unoyunodiez.com>
Desc: Revert "Merge pull request #22844 from lodr/bug-1043662-missing-labels"

This reverts commit d889984833025f208cfd3f3c2c37c87940a529dc, reversing
changes made to 8b1b64ca3347e015d7a57df6d053f95cd26046ca.
Bumping manifests a=b2g-bump