Remove a silly note from QFileDialog::getOpenFileNames documentation

I can't possibly understand the meaning of the note, especially
given the snippet. (However ,it has been there since Qt 3,
so perhaps it refers to some weird QValueList behavior?)

Change-Id: I952e9a7cb687b94cfccb927eb359b635804f4ade
Reviewed-by: Martin Smith <martin.smith@digia.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

src/widgets/dialogs/qfiledialog.cpp

@@ -2197,11 +2197,6 @@ QUrl QFileDialog::getOpenFileUrl(QWidget *parent,
     see the QFileDialog::Option enum for more information on the flags you can
     pass.
 
-    \note If you want to iterate over the list of files, you should iterate
-    over a copy. For example:
-
-    \snippet code/src_gui_dialogs_qfiledialog.cpp 10
-
     \warning Do not delete \a parent during the execution of the dialog. If you
     want to do this, you should create the dialog yourself using one of the
     QFileDialog constructors.

src/widgets/doc/snippets/code/src_gui_dialogs_qfiledialog.cpp

@@ -106,16 +106,6 @@ QStringList files = QFileDialog::getOpenFileNames(
 //! [9]
 
 
-//! [10]
-QStringList list = files;
-QStringList::Iterator it = list.begin();
-while(it != list.end()) {
-    myProcessing(*it);
-    ++it;
-}
-//! [10]
-
-
 //! [11]
 QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"),
                            "/home/jana/untitled.png",