Fix flicker.

Remove more code.

mindplot/src/main/javascript/util/Converter.js

@@ -1,31 +0,0 @@
-/*
- *    Copyright [2011] [wisemapping]
- *
- *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
- *   It is basically the Apache License, Version 2.0 (the "License") plus the
- *   "powered by wisemapping" text requirement on every single page;
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the license at
- *
- *       http://www.wisemapping.org/license
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
-
-mindplot.util.Converter = {
-
-    topicToScreenPosition : function(topic) {
-        $assert(topic, "topic is not defined");
-        $assert(this._screenManager, "screenManager is not defined");
-
-       return this._screenManager.getWorkspaceElementPosition(topic);
-    }
-};
-
-mindplot.util.Converter.setScreenManager = function(instance) {
-    this._screenManager = instance;
-};