Remove unnecessary SetAutoLayout(true) calls

There is no need to call SetAutoLayout() explicitly after (or just
before) calling SetSizer() with a valid sizer pointer, as SetSizer()
already enables automatic layout, so just drop the useless calls.

No real changes.

src/html/helpwnd.cpp

@@ -326,7 +326,6 @@ bool wxHtmlHelpWindow::Create(wxWindow* parent, wxWindowID id,
     // The sizer for the whole top-level window.
     wxSizer *topWindowSizer = new wxBoxSizer(wxVERTICAL);
     SetSizer(topWindowSizer);
-    SetAutoLayout(true);
 
 #if wxUSE_TOOLBAR
     // toolbar?