Unexport TabGroup property on Client for scripts

TabGroup is not (and should not be) a QObject which
makes it rather useless in scripting. In order to use
window tabs in KWin scripts the methods to interact
with tabs from Client should be used.

REVIEW: 104685

client.h

@@ -229,7 +229,7 @@ class Client
     /**
      * The "Window Tabs" Group this Client belongs to.
      **/
-    Q_PROPERTY(KWin::TabGroup* tabGroup READ tabGroup NOTIFY tabGroupChanged)
+    Q_PROPERTY(KWin::TabGroup* tabGroup READ tabGroup NOTIFY tabGroupChanged SCRIPTABLE false)
     /**
      * Whether this Client is the currently visible Client in its Client Group (Window Tabs).
      * For change connect to the visibleChanged signal on the Client's Group.

scripting/meta.cpp

@@ -20,7 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "meta.h"
 #include "client.h"
-#include "tabgroup.h"
 
 #include <QtScript/QScriptEngine>