remove bogus static variable in reportdesign OSectionWindow

which arrived with
   commit bee74696
   Date:   Tue Feb 1 13:42:47 2011 +0100
    dba34d: limit invalidate calls
and looks extremely dodgy, because it means only the very first report
design window will be correctly configured.

Change-Id: I127c733faaddcacd8507fa74aebe3b6da761327f
Reviewed-on: https://gerrit.libreoffice.org/63641
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

reportdesign/source/ui/report/SectionWindow.cxx

@@ -207,13 +207,9 @@ bool OSectionWindow::setGroupSectionTitle(
 
 void OSectionWindow::ImplInitSettings()
 {
-    static bool t = false;
-    if ( t )
-    {
     EnableChildTransparentMode();
     SetParentClipMode( ParentClipMode::NoClip );
     SetPaintTransparent( true );
-    }
     SetBackground( );
 }