[Gradle] Suppress unused task input

^KT-56904 In Progress

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/PublicPackageJsonTask.kt

@@ -48,6 +48,7 @@ abstract class PublicPackageJsonTask :
     @get:Internal
     abstract val packageJsonHandlers: ListProperty<Action<PackageJson>>
 
+    @Suppress("unused")
     @get:Input
     internal val packageJsonInputHandlers: Provider<PackageJson> by lazy {
         packageJsonHandlers.map { packageJsonHandlersList ->