D19383: remove kpackage_install_package deprecation warning

[Marco Martin]

mart accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R290 KPackage

BRANCH
  no-deprecate

REVISION DETAIL
  https://phabricator.kde.org/D19383

To: sitter, mart
Cc: kde-frameworks-devel, michaelh, ngraham, bruns