db.Model delete() instance method is not clearly visible in the documentation of model instance

[blep]

The part of the documentation documentating instance method barely mention the delete() method in the extra section. It should at least have an header to make it visible in the table of content.

I add to look-up the code to figure out what its name was before I could find the proper doc. There should also probably be a reference to the "making query" section of the documentation that has more documentation about deletion (kinda strange given the title ;-) ).

See:
​http://docs.djangoproject.com/en/dev/ref/models/instances/#ref-models-instances

[Alex Gaynor]

Dupe of #9503