Sections that already have images should not be suggested in the section-level image suggestions pipeline.

However, during manual testing, we discovered that some sections with images are still generating suggestions, even though there is some code called

prune_sections_with_images

This ticket is to look at the code in prune_sections_with_images and see where it's failing, suggest improvements, and make them (within reason, we know it won't be perfect).

Examples:

• The section https://es.wikipedia.org/wiki/Mate_Anastasia#Desigualdades generated a suggestion (but it already has an image)
• The section https://es.wikipedia.org/wiki/Sufragio_femenino_en_Mongolia#Efectividad_del_derecho_de_sufragio generated a suggestion (but it already has a suggestion)
• The section https://en.wikipedia.org/wiki/Mikhail_Voronin#Voronin_element generated a suggestion (this one has a gallery)
• The section https://en.wikipedia.org/wiki/1966_Iowa_gubernatorial_election#General_election generated a suggestion (this one has an image in an infobox)
• https://ru.wikipedia.org/wiki/BR_146 section "История создания и особенности электровоза" - generated a suggestion but it already has an image
• https://ru.wikipedia.org/wiki/%D0%98%D0%B1%D0%BD_%D0%AD%D0%B7%D1%80%D0%B0_(%D0%BB%D1%[…]0%BD%D0%BD%D1%8B%D0%B9_%D0%BA%D1%80%D0%B0%D1%82%D0%B5%D1%80) Section "Сателлитные кратеры" - generated a suggestion but it already has an image