chore: revert "fix(text-editor): close XSS vulnerability"

This reverts commit f9606ab.
This revert is just here so we can add a single commit where the
XSS vulnerability is fixed without introducing another bug. This
makes the fix easier to backport, if necessary.

Author: adrianschmidt

src/components/text-editor/prosemirror-adapter/prosemirror-adapter.tsx

@@ -259,7 +259,7 @@ export class ProsemirrorAdapter {
         if (this.contentType === 'markdown') {
             this.contentConverter = new MarkdownConverter(this.customElements);
         } else if (this.contentType === 'html') {
-            this.contentConverter = new HTMLConverter(this.customElements);
+            this.contentConverter = new HTMLConverter();
         } else {
             throw new Error(
                 `Unsupported content type: ${this.contentType}. Only 'markdown' and 'html' are supported.`,

src/components/text-editor/utils/html-converter.ts

@@ -1,20 +1,14 @@
 import { ContentTypeConverter } from './content-type-converter';
 import { EditorView } from 'prosemirror-view';
-import { markdownToHTML } from '../../markdown/markdown-parser';
-import { CustomElementDefinition } from '../../../interface';
 
 /**
  * @private
  */
 export class HTMLConverter implements ContentTypeConverter {
-    private customNodes: CustomElementDefinition[];
-
-    constructor(plugins: CustomElementDefinition[]) {
-        this.customNodes = plugins;
-    }
-
     public parseAsHTML = (text: string): Promise<string> => {
-        return markdownToHTML(text, { whitelist: this.customNodes });
+        return new Promise((resolve) => {
+            resolve(text);
+        });
     };
 
     public serialize = (view: EditorView): string => {