D18520: Remove dead code in TerminalDisplay

[Tomaz Canabrava]

tcanabrava added reviewers: Konsole, hindenburg, ngraham.

REPOSITORY
  R319 Konsole

REVISION DETAIL
  https://phabricator.kde.org/D18520

To: tcanabrava, #konsole, hindenburg, ngraham
Cc: konsole-devel, maciejn, thsurrel, ngraham, maximilianocuria, hindenburg
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