Add noop uninstall functor to pkg uninstall and fix removal.

Removal didn't correctly call a existing method as well
as the destroy didn't use a correct phase-name so that it
wouldn't be called in the first place.

Change-Id: Ic251c643a46ddf42dc1cdffdf6589cbf7fbe5617
Merge "Add noop uninstall functor to pkg uninstall and fix removal."