remove unused imports

src/main/java/org/cryptomator/ui/traymenu/TrayMenuBuilder.java

@@ -21,10 +21,6 @@ import javax.inject.Inject;
 import javafx.application.Platform;
 import javafx.beans.Observable;
 import javafx.collections.ObservableList;
-import java.awt.SystemTray;
-import java.awt.TrayIcon;
-import java.awt.event.MouseEvent;
-import java.awt.event.MouseListener;
 import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.util.ArrayList;