D22577: Remove unused pnm.desktop file

[Aleix Pol Gonzalez]

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

REPOSITORY
  R287 KImageFormats

REVISION DETAIL
  https://phabricator.kde.org/D22577

To: rempt, apol
Cc: kde-frameworks-devel, LeGast00n, sbergeron, michaelh, ngraham, bruns