D23958: Remove the web archiving plugin

[Volker Krause]

vkrause added a task: T11543: Port Konqueror away from KHTML.

REPOSITORY
  R226 Konqueror

REVISION DETAIL
  https://phabricator.kde.org/D23958

To: vkrause, dfaure, stefanocrocco
Cc: kde-doc-english, gennad, fbampaloukas, skadinna