[screenlocker] Remove setupPlasma from org.kde.screensaver interface

We don't have the plasma-overlay anymore, so let's remove it.

ksmserver/screenlocker/dbus/org.kde.screensaver.xml

@@ -1,8 +1,6 @@
 <!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
 <node>
   <interface name="org.kde.screensaver">
-    <!-- start in plasma setup mode -->
-    <method name="setupPlasma" />
     <!-- Re-read configuration -->
     <method name="configure" />
     <!-- Private API. Don't use. -->

ksmserver/screenlocker/interface.cpp

@@ -25,7 +25,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "powerdevilpolicyagent.h"
 // KDE
 #include <KIdleTime>
-#include <KProcess>
 #include <KRandom>
 // Qt
 #include <QtDBus/QDBusConnection>
@@ -202,18 +201,6 @@ void Interface::configure()
     m_daemon->configure();
 }
 
-void Interface::setupPlasma()
-{
-    KProcess *plasmaProc = new KProcess;
-    plasmaProc->setProgram(QLatin1String( "plasma-overlay" ));
-    *plasmaProc << QLatin1String( "--setup" );
-
-    //make sure it goes away when it's done (and not before)
-    connect(plasmaProc, SIGNAL(finished(int,QProcess::ExitStatus)), plasmaProc, SLOT(deleteLater()));
-
-    plasmaProc->start();
-}
-
 void Interface::saverLockReady()
 {
     // unused

ksmserver/screenlocker/interface.h

@@ -102,7 +102,6 @@ public Q_SLOTS:
     void UnThrottle(uint cookie);
 
     // org.kde.screensvar
-    void setupPlasma();
     void configure();
     void saverLockReady();