Revert previous docs update

docs/docs/concepts/text_splitters.mdx

@@ -100,7 +100,7 @@ Key benefits of structure-based splitting:
 - Can be more effective for downstream tasks like retrieval or summarization
 
 Examples of structure-based splitting:
-- **Markdown**: Split based on headers (e.g., #, ##, ###). The `ExperimentalMarkdownSyntaxTextSplitter` can be used to preserve the original structure and formatting, including whitespace, while extracting headers, code blocks, and horizontal rules as metadata.
+- **Markdown**: Split based on headers (e.g., #, ##, ###)
 - **HTML**: Split using tags
 - **JSON**: Split by object or array elements
 - **Code**: Split by functions, classes, or logical blocks