Removed extra heding

Author: LiamConnors

doc/python/annotated-heatmap.md

@@ -72,7 +72,6 @@ fig.show()
 
 ### Annotated Heatmaps with [figure factory](/python/figure-factories/). For more examples with Heatmaps, see [this page](/python/heatmaps/).
 
-
 The remaining examples show how to create Annotated Heatmaps with [figure factory](/python/figure-factories/). For more examples with Heatmaps, see [this page](/python/heatmaps/).
 
 
@@ -241,12 +240,6 @@ fig.update_layout(title_text='Periodic Table')
 fig.show()
 ```
 
-#### Annotations with plotly.express
-
-```python
-
-```
-
 #### Reference
 
 For more info on Plotly heatmaps, see: https://plotly.com/python/reference/heatmap/.<br> For more info on using colorscales with Plotly see: https://plotly.com/python/heatmap-and-contour-colorscales/ <br>For more info on `ff.create_annotated_heatmap()`, see the [full function reference](https://plotly.com/python-api-reference/generated/plotly.figure_factory.create_annotated_heatmap.html#plotly.figure_factory.create_annotated_heatmap)