REPORT-72634 设计器卡顿优化一期

designer-realize/src/main/java/com/fr/start/MainDesigner.java

@@ -75,10 +75,7 @@ import com.fr.start.server.ServerTray;
 import com.fr.third.org.apache.commons.lang3.time.StopWatch;
 import com.fr.van.chart.map.server.ChartMapEditorAction;
 import com.fr.workspace.WorkContext;
-import sun.awt.AppContext;
-
 import javax.swing.JPanel;
-import javax.swing.SwingWorker;
 import javax.swing.JComponent;
 import javax.swing.border.MatteBorder;
 import java.awt.Component;