gradle: Drop non-required buildscript blocks

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

build.gradle.kts

@@ -5,12 +5,6 @@
 
 import org.jlleitschuh.gradle.ktlint.KtlintExtension
 
-buildscript {
-    repositories {
-        google()
-    }
-}
-
 plugins {
     alias(libs.plugins.android.application) apply false
     alias(libs.plugins.android.library) apply false
@@ -21,10 +15,6 @@ plugins {
     alias(libs.plugins.jlleitschuh.ktlint) apply false
 }
 
-tasks.register("clean", Delete::class) {
-    delete(rootProject.buildDir)
-}
-
 subprojects {
     if (path != ":storage:demo") {
         apply(plugin = "org.jlleitschuh.gradle.ktlint")

settings.gradle.kts

@@ -4,20 +4,6 @@
 //
 
 pluginManagement {
-    buildscript {
-        repositories {
-            mavenCentral()
-            maven {
-                // https://issuetracker.google.com/issues/227160052#comment37
-                // This can be removed when we switch to Android Gradle plugin 8.2.
-                setUrl(uri("https://storage.googleapis.com/r8-releases/raw"))
-            }
-        }
-        dependencies {
-            classpath("com.android.tools:r8:8.2.28")
-        }
-    }
-
     repositories {
         gradlePluginPortal()
         google()