[Merge] ~nteodosio/software-properties:ppa-removal into software-properties:ubuntu/master

[Paride Legovini]

The diff itself LGTM, but I requested more info on the bug itself:

https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/2059796
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https://code.launchpad.net/~nteodosio/software-properties/+git/software-properties/+merge/463870
Your team Ubuntu Core Development Team is requested to review the proposed merge of ~nteodosio/software-properties:ppa-removal into software-properties:ubuntu/master.