Removing an app from the Android marketplace is very simple. Follow the steps below, and your app will no longer be visible in Google Play. This prevents new users from downloading your app.
1. Log into the Google Developer Console.
2. Under All Applications, select the app you wish to remove from the Play Store.
3. From the left-side menu, click the Store Listing tab.
4. Next, click the Published button at the top right corner and select "Unpublish app," as shown below.