delete unused code / cleanup

issue: TOBAGO-1633: TS refactoring
diff --git a/tobago-core/src/main/java/org/apache/myfaces/tobago/internal/renderkit/renderer/TreeRenderer.java b/tobago-core/src/main/java/org/apache/myfaces/tobago/internal/renderkit/renderer/TreeRenderer.java
index e4e01ff..44818ba 100644
--- a/tobago-core/src/main/java/org/apache/myfaces/tobago/internal/renderkit/renderer/TreeRenderer.java
+++ b/tobago-core/src/main/java/org/apache/myfaces/tobago/internal/renderkit/renderer/TreeRenderer.java
@@ -53,13 +53,13 @@
 
   private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
 
-  protected static final String SCROLL_POSITION = ComponentUtils.SUB_SEPARATOR + "scrollPosition";
+  protected static final String SCROLL_POSITION = "scrollPosition";
 
   @Override
   public void decode(final FacesContext facesContext, final UIComponent component) {
     final AbstractUITree tree = (AbstractUITree) component;
     final String value = facesContext.getExternalContext().getRequestParameterMap().get(
-        tree.getClientId(facesContext) + SCROLL_POSITION);
+        tree.getClientId(facesContext) + ComponentUtils.SUB_SEPARATOR + SCROLL_POSITION);
     if (value != null) {
       tree.getState().getScrollPosition().update(value);
     }
@@ -162,11 +162,11 @@
     writer.endElement(HtmlElements.INPUT);
 
     writer.startElement(HtmlElements.INPUT);
-    writer.writeIdAttribute(clientId + SCROLL_POSITION);
-    writer.writeNameAttribute(clientId + SCROLL_POSITION);
+    writer.writeIdAttribute(clientId + ComponentUtils.SUB_SEPARATOR + SCROLL_POSITION);
+    writer.writeNameAttribute(clientId + ComponentUtils.SUB_SEPARATOR + SCROLL_POSITION);
     writer.writeAttribute(HtmlAttributes.TYPE, HtmlInputTypes.HIDDEN);
     writer.writeAttribute(HtmlAttributes.VALUE, tree.getState().getScrollPosition().encode(), false);
-    writer.writeAttribute(DataAttributes.SCROLL_POSITION, Boolean.TRUE.toString(), true);
+    writer.writeAttribute(DataAttributes.SCROLL_POSITION, Boolean.TRUE.toString(), false);
     writer.endElement(HtmlElements.INPUT);
 
     writer.endElement(HtmlElements.DIV);
diff --git a/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-utils.ts b/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-utils.ts
index d90707d..66b8423 100644
--- a/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-utils.ts
+++ b/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-utils.ts
@@ -189,52 +189,4 @@
     }
     return id.substring(0, id.lastIndexOf(":"));
   }
-
-  /**
-   * fix position, when the element it is outside of the current page
-   * @param elements is an jQuery Array of elements to be fixed.
-   */
-  static keepElementInVisibleArea(elements) {
-    elements.each(function () {
-      var element = jQuery(this);
-      var page = jQuery(".tobago-page-content:first");
-      var left = element.offset().left;
-      var top = element.offset().top;
-      // fix menu position, when it is outside of the current page
-      left = Math.max(0, Math.min(left, page.outerWidth() - element.outerWidth()));
-      top = Math.max(0, Math.min(top, page.outerHeight() - element.outerHeight()));
-      element.css('left', left);
-      element.css('top', top);
-    });
-  }
-
-  static addDataMarkup(element, markupString) {
-    var dataTobagoMarkup = element.attr("data-tobago-markup");
-    if (dataTobagoMarkup !== undefined) {
-      var markups = jQuery.parseJSON(dataTobagoMarkup);
-      markups.push(markupString);
-      element.attr("data-tobago-markup", JSON.stringify(markups));
-    } else {
-      element.attr("data-tobago-markup", JSON.stringify(markupString));
-    }
-  }
-
-  static removeDataMarkup(element, markupString) {
-    var dataTobagoMarkup = element.attr("data-tobago-markup");
-    if (dataTobagoMarkup !== undefined) {
-      var markups = jQuery.parseJSON(dataTobagoMarkup);
-      var index = jQuery.inArray(markupString, markups);
-      if (index >= 0) {
-        markups.splice(index, 1);
-      } else if (markups === markupString) {
-        markups = [];
-      }
-
-      if (markups.length > 0) {
-        element.attr("data-tobago-markup", JSON.stringify(markups));
-      } else {
-        element.removeAttr("data-tobago-markup");
-      }
-    }
-  }
 }
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