drop some unnecessary headers

Change-Id: I203824738f3e3eb5ff21b9099c731e7026e644f6
Reviewed-on: https://gerrit.libreoffice.org/61785
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

chart2/source/controller/dialogs/res_ErrorBar.cxx

@@ -27,8 +27,6 @@
 
 #include <rtl/math.hxx>
 #include <sal/log.hxx>
-#include <vcl/dialog.hxx>
-#include <vcl/layout.hxx>
 #include <svl/stritem.hxx>
 
 #define CHART_LB_FUNCTION_STD_ERROR     0

chart2/source/controller/dialogs/tp_ChartType.cxx

@@ -28,7 +28,6 @@
 
 #include <svtools/controldims.hxx>
 
-#include <vcl/layout.hxx>
 #include <vcl/weld.hxx>
 #include <tools/diagnose_ex.h>
 #include <sal/log.hxx>

chart2/source/controller/dialogs/tp_DataSourceControls.cxx

@@ -17,7 +17,6 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#include <vcl/layout.hxx>
 #include <vcl/builderfactory.hxx>
 #include "tp_DataSourceControls.hxx"