Gradle: let Kotlin plugin add standard library dependency

Author: greenrobot-team

objectbox-kotlin/build.gradle.kts

@@ -58,10 +58,8 @@ val sourcesJar by tasks.registering(Jar::class) {
 }
 
 val coroutinesVersion: String by rootProject.extra
-val kotlinVersion: String by rootProject.extra
 
 dependencies {
-    implementation("org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion")
     // Note: compileOnly as we do not want to require library users to use coroutines.
     compileOnly("org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutinesVersion")
 

objectbox-rxjava3/build.gradle.kts

@@ -38,16 +38,13 @@ dokkaHtml.configure {
     }
 }
 
-val kotlinVersion: String by rootProject.extra
 val junitVersion: String by rootProject.extra
 val mockitoVersion: String by rootProject.extra
 
 dependencies {
     api(project(":objectbox-java"))
     api("io.reactivex.rxjava3:rxjava:3.0.11")
-    compileOnly("org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion")
 
-    testImplementation("org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion")
     testImplementation("junit:junit:$junitVersion")
     testImplementation("org.mockito:mockito-core:$mockitoVersion")
 }

tests/objectbox-java-test/build.gradle.kts

@@ -43,14 +43,12 @@ repositories {
 
 val obxJniLibVersion: String by rootProject.extra
 
-val kotlinVersion: String by rootProject.extra
 val coroutinesVersion: String by rootProject.extra
 val essentialsVersion: String by rootProject.extra
 val junitVersion: String by rootProject.extra
 
 dependencies {
     implementation(project(":objectbox-java"))
-    implementation("org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion")
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutinesVersion")
     implementation(project(":objectbox-kotlin"))
     implementation("org.greenrobot:essentials:$essentialsVersion")