migrate to built-in Kotlin

Author: 314systems

app/build.gradle

@@ -18,7 +18,6 @@
 
 plugins {
     id "com.android.application"
-    id "kotlin-android"
     id "jacoco"
     id "org.jlleitschuh.gradle.ktlint" version "14.0.1"
 }
@@ -41,7 +40,6 @@ dependencies {
     implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.10.0'
     implementation 'androidx.media:media:1.7.1'
     implementation 'androidx.preference:preference-ktx:1.2.1'
-    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     implementation 'com.jjoe64:graphview:4.2.2'
     // Unit Test Dependencies
     testImplementation 'androidx.test.ext:junit:1.3.0'
@@ -50,8 +48,6 @@ dependencies {
     testImplementation 'org.mockito:mockito-core:5.21.0'
     testImplementation 'org.mockito.kotlin:mockito-kotlin:6.2.3'
     testImplementation 'org.robolectric:robolectric:4.16.1'
-    testImplementation "org.jetbrains.kotlin:kotlin-test:$kotlin_version"
-    testImplementation "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
     testImplementation 'org.slf4j:slf4j-simple:2.0.17'
     testImplementation 'org.assertj:assertj-core:3.27.7'
     testImplementation 'org.hamcrest:hamcrest:3.0'
@@ -121,9 +117,6 @@ android {
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17
     }
-    kotlinOptions {
-        jvmTarget = "17"
-    }
 
     lint {
         lintConfig = file("lint.xml")

build.gradle

@@ -19,17 +19,13 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext {
-        kotlin_version = '2.3.0'
-    }
     repositories {
         google()
         mavenCentral()
         gradlePluginPortal() // Added for plugin resolution
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:9.0.0'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "com.github.ben-manes:gradle-versions-plugin:0.53.0"
     }
 }

gradle.properties

@@ -22,10 +22,6 @@ android.jetifier.ignorelist=bcprov-jdk15on
 # Kotlin code style
 kotlin.code.style=official
 
-# Default: true | Low Kotlin version is explicitly managed in `build.gradle`.
-android.builtInKotlin=false
-# Default: true | Build scripts may need DSL syntax updates.
-android.newDsl=false
 # Default: false | Release build may fail if R8 rules are incomplete.
 android.r8.strictFullModeForKeepRules=true
 # Default: false | Resources may be incorrectly removed, causing runtime crashes.