remove maven push logic

The public doesn't need the maven repo
logic. The gradle build was failing if
this was left here unused.

Author: Vivek Ayer

OneSignalSDK/onesignal/build.gradle

@@ -39,5 +39,3 @@ dependencies {
     compile 'com.google.android.gms:play-services-gcm:8.4.0'
     compile 'com.google.android.gms:play-services-location:8.4.0'
 }
-
-apply from: 'maven-push.gradle'