Documentation Link

https://github.com/matplotlib/matplotlib/blob/main/lib/matplotlib/animation.py

Problem

There are some TODO's that appear to be out of date:

• TODO for documentation to be created
• The SciPy Cookbook looks like it isn't really maintained anymore, should we remove the TODO to update?
• TODO for blit on Qt4 - Qt4 has been unsupported since 2015.

 TODO:
 * Documentation -- this will need a new section of the User's Guide.
      Both for Animations and just timers.
   - Also need to update
     https://scipy-cookbook.readthedocs.io/items/Matplotlib_Animations.html
 * Blit
   * Currently broken with Qt4 for widgets that don't start on screen

Suggested improvement

Remove old and out-of-date TODO's