Drop X event handling from Group

Dead code

events.cpp

@@ -1634,18 +1634,5 @@ void Toplevel::propertyNotifyEvent(xcb_property_notify_event_t *e)
     emit propertyNotify(this, e->atom);
 }
 
-// ****************************************
-// Group
-// ****************************************
-
-bool Group::groupEvent(XEvent* e)
-{
-    unsigned long dirty[ 2 ];
-    leader_info->event(e, dirty, 2);   // pass through the NET stuff
-    if ((dirty[ NETWinInfo::PROTOCOLS2 ] & NET::WM2StartupId) != 0)
-        startupIdChanged();
-    return false;
-}
-
 
 } // namespace

group.h

@@ -49,7 +49,6 @@ public:
     void removeMember(Client* member);
     void gotLeader(Client* leader);
     void lostLeader();
-    bool groupEvent(XEvent* e);
     void updateUserTime(Time time = CurrentTime);
     Time userTime() const;
     void ref();