[Merge] ~khurshid-alam/ubuntu/+source/ubuntu-settings:usd-schemas into ~ubuntu-desktop/ubuntu/+source/ubuntu-settings:master

[Khurshid Alam]

The proposal to merge ~khurshid-alam/ubuntu/+source/ubuntu-settings:usd-schemas into ~ubuntu-desktop/ubuntu/+source/ubuntu-settings:master has been updated.

Commit message changed to:

Remove screensaver override for unity

Unity is now using it's own schema for media keys. See LP: #1842324

For more details, see:
https://code.launchpad.net/~khurshid-alam/ubuntu/+source/ubuntu-settings/+git/ubuntu-settings/+merge/372202
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