Drop backend() -> AbstractBackend* from WaylandServer

No longer needed, provided through Application::platform().

Reviewers: #plasma

Subscribers: plasma-devel

Projects: #plasma

Differential Revision: https://phabricator.kde.org/D1339

wayland_server.cpp

@@ -513,9 +513,4 @@ bool WaylandServer::isScreenLocked() const
            ScreenLocker::KSldApp::self()->lockState() == ScreenLocker::KSldApp::AcquiringLock;
 }
 
-AbstractBackend *WaylandServer::backend() const
-{
-    return kwinApp()->platform();
-}
-
 }

wayland_server.h

@@ -58,7 +58,6 @@ namespace KWin
 {
 class ShellClient;
 
-class AbstractBackend;
 class AbstractClient;
 
 class KWIN_EXPORT WaylandServer : public QObject
@@ -106,8 +105,6 @@ public:
     ShellClient *findClient(KWayland::Server::SurfaceInterface *surface) const;
     ShellClient *findClient(QWindow *w) const;
 
-    AbstractBackend *backend() const;
-
     /**
      * @returns file descriptor for Xwayland to connect to.
      **/