Revert "Merge branch 'master' of https://github.com/mozilla-b2g/gaia"

This reverts commit cb090fc1bc5d60c0e810dc33c3e0ef46ee678a23, reversing
changes made to 520aa82e0c5e0a1f90544a682e779bf9b8af1e93.
Revert "Merge branch 'master' of https://github.com/mozilla-b2g/gaia"

This reverts commit 520aa82e0c5e0a1f90544a682e779bf9b8af1e93, reversing
changes made to 2b64b43391a8a747b6381bdf072fd94265ae8909.
Revert "Merge branch 'master' of https://github.com/mozilla-b2g/gaia"

This reverts commit 2b64b43391a8a747b6381bdf072fd94265ae8909, reversing
changes made to 2a3ac3962b898f934e224741d839f5bc6d18c542.