Old Android devices can't be completely removed from the Play Store archive, but you can hide them so they no longer appear on your device list. This makes it much easier to navigate the list, especially if you've owned dozens of Android gadgets over the last few years.
Over time, your Google Play devices list can become filled with phones you no longer use.
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- How to remove devices in Google Play
1. Open the Google Play Store in your web browser and click the small gear icon in the top-right of the screen and click the sub-menu called Settings.
2. You will now see the My Devices page where your device activity in Google Play is recorded. You'll see all the devices you have ever logged into Google Play with, and a few details to the right of each device. Click the gear icon, then Settings to see your Google Play device list.
3. You can choose whether the particular device should appear in menus or not by checking or unchecking the boxes under Visibility.
4. Click Edit to assign a catchy nickname to your gadgets. By default, the Play Store lists a lot of gadgets as Unknown device. By assigning a nickname you can see at a glance which smartphone or tablet it is.
5. Once you've renamed devices, click the Update button to the far right to save your changes. These changes are universal, so they will now apply in all Google properties. That means all of your visible devices will be renamed in the Play Store Compatible devices list, as well as in Android Device Manager and so on.
Original site
https://www.androidpit.com/how-to-remove-my-device-from-google-play