Get rid of some old pre qt 5 code

PlanePlugin.cc

@@ -321,8 +321,3 @@ bool PlanePlugin::getIntersectionParams(BaseObjectData& _obj, ACG::Vec3d& _cente
 }
 
 //------------------------------------------------------------------------------
-
-#if QT_VERSION < 0x050000
-Q_EXPORT_PLUGIN2( planeplugin, PlanePlugin );
-#endif
-

PlanePlugin.hh

@@ -29,9 +29,9 @@ class PlanePlugin : public QObject, BaseInterface, MouseInterface, KeyInterface,
    Q_INTERFACES( ToolbarInterface )
    Q_INTERFACES( ScriptInterface )
    Q_INTERFACES( LoadSaveInterface )
-#if QT_VERSION >= 0x050000
+
   Q_PLUGIN_METADATA(IID "org.OpenFlipper.Plugins.Plugin-Plane")
-#endif
+
 
   signals:
     // BaseInterface
@@ -151,7 +151,7 @@ class PlanePlugin : public QObject, BaseInterface, MouseInterface, KeyInterface,
 
 #if defined(INCLUDE_TEMPLATES) && !defined(PLANEPLUGIN_CC)
 #define PLANEPLUGIN_TEMPLATES
-#include "PlanePluginT.cc"
+#include "PlanePluginT_impl.hh"
 #endif
 //=============================================================================
 #endif  // PLANEPLUGIN_HH