remove mod_articles_archive

Closes #54
remove mod_articles_categories

Closes #55
remove mod_articles_category

Closes #56
remove mod_articles_latest

Closes #57
remove mod_article_latest from category model

affected issue #57
remove mod_article_latest from article mdel

affected issue #57
remove mod_articles_news

Closes #58
remove mod_articles_popular

Closes #59
remove mod_related_items

Closes #60
remove mod_users_latest

Closes #61