T11542: Remove KHTML

[Carl Schwan]

ognarb added a revision: D25714: Port away from deprecated KHtml.

TASK DETAIL
  https://phabricator.kde.org/T11542

To: ognarb
Cc: cordlandwehr, ngraham, #konqueror, #plasma, #okular, #kde_applications, #frameworks, knauss, davidre, GB_2, ahmadsamir, kpiwowarski, asturmlechner, cfeck, cullmann, vkrause, dfaure
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