Long story short, I have a site that's about a year old and covers a wide range of topics. However, almost all of the attention from users is going towards a few specific categories and sub-categories which are all related. I want to get rid of all the other topics/pages/content from the site and just focus on the topics getting attention since they're all related so I can easily target the site towards that audience instead of trying to have broad appeal. The other parts of the site take an incredible amount of time and effort to maintain and are getting almost no attention from users. My question is, can I chop off all the shit I don't want and turn it into a niche site instead, or will Google slap me for having so many missing pages all of a sudden? From a business perspective I know this is a smart move, but I want some advice from people who know more about SEO than I do. I appreciate any input you guys have here.