Doc: Remove PostScript print support

PostScript support was removed back in 2011, but not documented then:
34f712e79e97b757b4426e1ffa09e065c9e379a1 (qtbase.git)

Change-Id: I1416966d36793abb0c0135586531cd76867a2bb0
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

doc/src/graphics.qdoc

@@ -163,11 +163,11 @@ need to be direct.
 \section1 Printing
 
 Qt supports printing both directly to actual printers, locally or on the
-network, as well as producing PDF or PostScript output. How to do printing with
+network, as well as producing PDF output. How to do printing with
 Qt is described in detail on the \l {Qt Print Support} page.
 
 To be able to access the Qt printing classes from your application or library, see
-the \l {Qt Print Support module} page.
+the \l {Qt Print Support} module page.
 
 
 

doc/src/source-breaks.qdoc

@@ -292,6 +292,7 @@ The following sections lists the API changes in each module and provides recomme
     \list
      \li The \l{QPageSetupDialog::PageSetupDialogOption} enum and the corresponding set and get functions, \c{QPageSetupDialog::options()}
          and \c{QPageSetupDialog::setOptions()} are removed.
+     \li Support for printing PostScript files has been removed.
     \endlist
 
 \section1 Changes to Qt Network