Merge pull request #138 from doctau/unused-import

Remove unused import, which causes build failure when JavaFX is not available

Author: chewiebug

src/main/java/com/tagtraum/perf/gcviewer/SimpleChartRenderer.java

@@ -16,7 +16,6 @@
 import javax.swing.SwingUtilities;
 
 import com.tagtraum.perf.gcviewer.model.GCModel;
-import javafx.scene.chart.Chart;
 
 public class SimpleChartRenderer {
     private static final Logger LOGGER = Logger.getLogger(SimpleChartRenderer.class.getName());