Simple Android Game Editing

I will give source code. You can check my game here: [login to view URL] It has google play games integration but not working correctly. I want you to remove it. I got email from Admob to upgrade "ads sdk". (Upgrade your Google Mobile Ads SDK to ensure ads keep serving) Starting January 23, 2018, we will no longer be supporting Android and iOS Google Mobile Ads SDKs lower than version 7.0.0. To continue serving ads from AdMob after this date, please upgrade to the latest Google Mobile Ads SDK. You just need to upgrade it too. My project is android studio project. I'm using Android Studio 2.2.3 on ubuntu. To sum up: 1- Remove google play games integration, leaderboard etc. 2- Update google play services for admob works without any problem, banner and interstitial ads (now working) 3- Clean code and make it stable