Revert "SAK-50802 Lessons creates a Lessons links on navigation when …

…there are no items in an export (#13223)"

This reverts commit afd0c6b.

lessonbuilder/tool/src/java/org/sakaiproject/lessonbuildertool/service/LessonBuilderEntityProducer.java

@@ -1272,27 +1272,7 @@ public String merge(String siteId, Element root, String archivePath, String from
 			 String pagePosition = element.getAttribute("pagePosition");
 			 String pageVisibility = element.getAttribute("pageVisibility");
 
-			 NodeList lessonBuilderTools = root.getElementsByTagName("lessonbuilder");
-			 boolean lessonHasContent = false;
-
-			 for (int toolIndex = 0; toolIndex < lessonBuilderTools.getLength() && !lessonHasContent; toolIndex++) {
-				 Node lessonBuilderNode = lessonBuilderTools.item(toolIndex);
-				 if (lessonBuilderNode.getNodeType() == Node.ELEMENT_NODE) {
-					 Element lessonBuilderElement = (Element) lessonBuilderNode;
-					 NodeList lessonPages = lessonBuilderElement.getElementsByTagName("page");
-
-					 for (int pageIndex = 0; pageIndex < lessonPages.getLength() && !lessonHasContent; pageIndex++) {
-						 Element currentPage = (Element) lessonPages.item(pageIndex);
-						 NodeList pageItems = currentPage.getElementsByTagName("item");
-
-						 if (pageItems != null && pageItems.getLength() > 0) {
-							 lessonHasContent = true;
-						 }
-					 }
-				 }
-			 }
-
-			 if(toolTitle != null && lessonHasContent) {
+			 if(toolTitle != null) {
 			     Tool tr = toolManager.getTool(LessonBuilderConstants.TOOL_ID);
 			     SitePage page = null;
 			     ToolConfiguration tool = null;