Moved class FileUtils out of Internal namespace

...because it is being exported.

Change-Id: If2892f8455b7c7fb9a78a8cde27642901ae4bf3a
Reviewed-on: http://codereview.qt.nokia.com/3676
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/plugins/coreplugin/fileutils.h

@@ -40,7 +40,6 @@ class QWidget;
 QT_END_NAMESPACE
 
 namespace Core {
-namespace Internal {
 
 struct CORE_EXPORT FileUtils
 {
@@ -52,7 +51,6 @@ struct CORE_EXPORT FileUtils
     static QString msgTerminalAction();
 };
 
-} // namespace Internal
 } // namespace Core
 
 #endif // FILEUTILS_H