Remove the unnecessary look and feel changing in the visualization project.

AMAPVox/AMAPVoxVisualization/src/main/java/fr/amap/lidar/amapvox/visualization/Visualization.java

@@ -70,15 +70,6 @@ public class Visualization {
      */
     public static final void launch(final InputStream in, final String filepath, 
             final String defaultProperty) {
-        /* Set the Nimbus look and feel */
-        try {
-            javax.swing.UIManager.
-                    setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
-        } catch (ClassNotFoundException | InstantiationException
-                | IllegalAccessException | UnsupportedLookAndFeelException ex) {
-            Logger.getLogger(Visualization.class.getName()).log(Level.SEVERE, null, ex);
-        }
-
         javax.swing.SwingUtilities.invokeLater(() -> {
             new Thread(() -> {
                 try {