Remove warnings by adding a parameter to the compilation task. Kotlin/kotlinx.coroutines#859

Author: Serchinastico

app/build.gradle

@@ -3,9 +3,7 @@ repositories {
 }
 
 apply plugin: "com.android.application"
-
 apply plugin: "kotlin-android"
-
 apply plugin: "kotlin-android-extensions"
 
 android {
@@ -82,8 +80,6 @@ task ktlintFormat(type: JavaExec, group: "formatting") {
   args "-F", "src/**/*.kt"
 }
 
-kotlin {
-  experimental {
-    coroutines "enable"
-  }
+tasks.withType(org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile).all {
+  kotlinOptions.freeCompilerArgs += ["-Xuse-experimental=kotlinx.coroutines.ExperimentalCoroutinesApi"]
 }

app/src/main/java/com/karumi/kataloginlogoutkotlin/Presenter.kt

@@ -1,12 +1,10 @@
 package com.karumi.kataloginlogoutkotlin
 
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.cancel
 import kotlinx.coroutines.launch
 
-@ExperimentalCoroutinesApi
 class Presenter(
     private val logInLogOutKata: LogInLogOutKata,
     private val view: View