D25555: deprecate kregexpeditorinterface

[Nicolas Fella]

nicolasfella added a task: T12159: KTextWidgets: Remove plugin system.

REPOSITORY
  R310 KTextWidgets

REVISION DETAIL
  https://phabricator.kde.org/D25555

To: nicolasfella, #frameworks
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns