The Play Store has removed over 700,000 applications when it updated. The apps that were removed are supposedly bad and can cause problems when downloaded to your very own smartphone. It will be hard for Google to keep track of all the apps so you cannot expect that all of the bad apps are removed.
There are some applications, however, that you wished to see but did not see anymore. Sarahah is one of these applications that were removed because it is reportedly being used by people as it can provide people with anonymity. Another application is AdAway which is effective in removing unwanted ads from the apps that can be used.