D5082: rip out ancient compat code which was meant to have disappeared in 4.11

[Harald Sitter]

sitter created this revision.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

REPOSITORY
  R120 Plasma Workspace

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D5082

AFFECTED FILES
  drkonqi/debuggermanager.cpp

To: sitter, broulik
Cc: plasma-devel, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, 
sebas, apol