D9370: Stata highlighting: Remove unused itemData and fix non-existing attribute

[Volker Krause]

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

REPOSITORY
  R216 Syntax Highlighting

BRANCH
  FixStata (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D9370

To: dhaumann, vkrause
Cc: #frameworks