[draw.io] Remove unnecessary code & change viewer.min.js URL

resource/cdn-manifests.js

@@ -81,7 +81,7 @@ module.exports = {
     },
     {
       name: 'drawio-viewer',
-      url: 'https://www.draw.io/js/viewer.min.js',
+      url: 'https://jgraph.github.io/drawio/src/main/webapp/js/viewer.min.js',
       groups: ['basis'],
       args: {
         integrity: '',

src/client/js/components/Page/RevisionBody.jsx

@@ -10,9 +10,6 @@ export default class RevisionBody extends React.PureComponent {
 
     // create debounced method for rendering MathJax
     this.renderMathJaxWithDebounce = debounce(200, this.renderMathJax);
-
-    // create debounced method for rendering draw.io
-    this.renderDrawioWithDebounce = debounce(200, this.renderDrawio);
   }
 
   componentDidMount() {

src/client/js/util/markdown-it/drawio-viewer.js

@@ -1,15 +1,7 @@
 export default class DrawioViewerConfigurer {
 
-  constructor(crowi) {
-    // this.crowi = crowi;
-    // const config = crowi.getConfig();
-
-    this.drawioViewerURL = 'https://www.draw.io/js/viewer.min.js';
-  }
-
   configure(md) {
     md.use(require('markdown-it-drawio-viewer'), {
-      drawioViewerURL: this.drawioViewerURL,
       marker: ':::',
     });
   }