Make DownloadTexts::get_extracted_html private.
Purge local function regenerate_download_texts_for_downloads since it's no longer called.
Purge update_text method which is no longer called.
Purge no longer called private method.
MediaWords::DBI::Downloads::extractor_results_for_download now stores the extracted_html and extracted_text.
Get rid of update_extractor_results_with_text_and_html since text and html are now calculated in extractor_results_for_download.