1. Open AndroidManifest.xml
Replace
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
with
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" tools:node="remove"/>
2. Open AndroidManifest.xml
Remove
<activity android:name=".InAppUpdate" />
3. Delete InAppUpdate.java from source files
4. Delete activity_in__app__update.xml from res/layout folder
5. Open Splash.java in source files and search for function inAppUpdateDialog and remove all code inside the funtion