Make NativeRandom an object instead of a class with companion

runtime/src/main/kotlin/kotlin/random/Random.kt

@@ -7,11 +7,10 @@ package kotlin.random
 import kotlin.native.concurrent.AtomicLong
 import kotlin.system.getTimeNanos
 
-internal class NativeRandom {
 /**
-     * A default pseudo-random linear congruential generator.
+ * The default implementation of pseudo-random generator using the linear congruential generator.
  */
-    companion object : Random() {
+internal object NativeRandom : Random() {
     private const val MULTIPLIER = 0x5deece66dL
     private val _seed = AtomicLong(mult(getTimeNanos()))
 
@@ -35,7 +34,6 @@ internal class NativeRandom {
 
     override fun nextInt(): Int = nextBits(32)
 }
-}
 
 internal actual fun defaultPlatformRandom(): Random = NativeRandom