REPORT-30352 删除不需要的import

designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/RTextAreaBase.java

@@ -22,7 +22,6 @@ import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.awt.event.MouseMotionListener;
 import javax.swing.JTextArea;
-import javax.swing.border.EmptyBorder;
 import javax.swing.event.CaretEvent;
 import javax.swing.plaf.ColorUIResource;
 import javax.swing.plaf.TextUI;