reverted the change of r32940 which worked around a bug due to associating a dummy line with the root group, it's no longer necessary now that the root group line is always NULL

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@49477 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/fileconf.cpp

@@ -1312,9 +1312,6 @@ void wxFileConfig::LineListRemove(wxFileConfigLineList *pLine)
     else
         pNext->SetPrev(pPrev);
 
-    if ( m_pRootGroup->GetGroupLine() == pLine )
-        m_pRootGroup->SetLine(m_linesHead);
-
     wxLogTrace( FILECONF_TRACE_MASK,
                 _T("        head: %s"),
                 ((m_linesHead) ? (const wxChar*)m_linesHead->Text().c_str()