Update README.md

Author: atc1441

README.md

@@ -11,9 +11,6 @@ After installation the Core works as in the Video
 Here is the [D6Flasher](https://play.google.com/store/apps/details?id=com.atcnetz.ble.readwrite) on Google Play-store
 with the Flasher it is Possible to flash the Created firmware over the air, please view the Youtube Video.
 
-You can buy the Tracker on Gearbest for as Cheap as 5$ [https://www.gearbest.com/smart-watches/pp_1232618.html?wid=1433363&lkid=52058797](https://www.gearbest.com/smart-watches/pp_1232618.html?wid=1433363&lkid=52058797)
-Coupon: GB0722MPOW
-
 ## Installing
 
 ### Board Manager