D12450: Drop unused functions from storage

[Sandro Knauß]

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

REPOSITORY
  R201 Akregator

BRANCH
  cleanups

REVISION DETAIL
  https://phabricator.kde.org/D12450

To: pinaraf, knauss
Cc: #kde_pim, dvasin, winterz, vkrause, mlaurent, knauss, dvratil
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