Remove OneSignal gradle plugin from build.gradle files

Author: brismithers

Examples/OneSignalDemo/build.gradle

@@ -11,7 +11,6 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:7.0.4'
         classpath 'com.google.gms:google-services:4.3.10'
-        classpath 'gradle.plugin.com.onesignal:onesignal-gradle-plugin:[0.14.0, 0.99.99]'
         classpath 'com.huawei.agconnect:agcp:1.6.2.300'
 
         // TODO: Do not place your application dependencies here; they belong

OneSignalSDK/build.gradle

@@ -15,19 +15,12 @@ buildscript {
         kotlinVersion = '1.4.32'
         ktlintVersion = '11.0.0'
         detektVersion = '1.21.0'
-        onesignalGradlePluginVersion = '[0.14.0, 0.99.99]'
     }
 
     repositories {
         google()
         mavenCentral()
-
-        // OneSignal-Gradle-Plugin - Local testing
-        // maven { url uri('../../repo') }
-
-        // OneSignal-Gradle-Plugin - Public version
         gradlePluginPortal()
-
         // Huawei maven
         maven { url 'https://developer.huawei.com/repo/' }
     }
@@ -39,12 +32,6 @@ buildscript {
 
         classpath "org.jlleitschuh.gradle:ktlint-gradle:$ktlintVersion"
         classpath "io.gitlab.arturbosch.detekt:detekt-gradle-plugin:$detektVersion"
-
-        // OneSignal-Gradle-Plugin - Local testing
-        // classpath 'com.onesignal:onesignal-gradle-plugin:[0.8.1, 0.99.99]'
-
-        // OneSignal-Gradle-Plugin - Public version
-        classpath "gradle.plugin.com.onesignal:onesignal-gradle-plugin:$onesignalGradlePluginVersion"
     }
 }