you basically need to find what tags in the html source code relate to images.
read the calibre help
http://manual.calibre-ebook.com/news_recipe.html
and try the remove tags as in the example
remove_tags = []¶
List of tags to be removed. Specified tags are removed from downloaded HTML. A tag is specified as a dictionary of the form:
{
name : 'tag name', #e.g. 'div'
attrs : a dictionary, #e.g. {class: 'advertisment'}
}All keys are optional. For a full explanantion of the search criteria, see Beautiful Soup A common example:
remove_tags = [dict(name='div', attrs={'class':'advert'})]
This will remove all <div class=”advert”> tags and all their children from the downloaded HTML.