D9174: Remove multihead from Plasmashell scripting

[Aleix Pol Gonzalez]

apol added a comment.

  +1

REPOSITORY
  R120 Plasma Workspace

REVISION DETAIL
  https://phabricator.kde.org/D9174

To: davidedmundson, #plasma
Cc: apol, plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, 
jensreuterberg, abetts, sebas, mart