remove default constrcutor pf ModifyChecker
diff --git a/1.5/plugins/org.eclipse.epf.authoring.ui/src/org/eclipse/epf/authoring/ui/util/UIHelper.java b/1.5/plugins/org.eclipse.epf.authoring.ui/src/org/eclipse/epf/authoring/ui/util/UIHelper.java
index 9ac6de9..bb42e32 100644
--- a/1.5/plugins/org.eclipse.epf.authoring.ui/src/org/eclipse/epf/authoring/ui/util/UIHelper.java
+++ b/1.5/plugins/org.eclipse.epf.authoring.ui/src/org/eclipse/epf/authoring/ui/util/UIHelper.java
@@ -620,9 +620,6 @@
 	public static class ModifyChecker implements IModifyChecker {
 		private Shell shell;
 		
-		public ModifyChecker() {
-		}
-		
 		public ModifyChecker(Shell shell) {
 			this.shell = shell;
 		}