Remove hidden Random.Companion

It was never released as stable since 1.3. Was provided for binary
compatibility with 1.3 prereleases.

libraries/stdlib/src/kotlin/random/Random.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
@@ -261,16 +261,6 @@ public abstract class Random {
         override fun nextBytes(array: ByteArray): ByteArray = defaultRandom.nextBytes(array)
         override fun nextBytes(size: Int): ByteArray = defaultRandom.nextBytes(size)
         override fun nextBytes(array: ByteArray, fromIndex: Int, toIndex: Int): ByteArray = defaultRandom.nextBytes(array, fromIndex, toIndex)
-
-        @Deprecated("Use Default companion object instead", level = DeprecationLevel.HIDDEN)
-        @Suppress("DEPRECATION_ERROR")
-        @kotlin.jvm.JvmField
-        public val Companion: Random.Companion = Random.Companion
-    }
-
-    @Deprecated("Use Default companion object instead", level = DeprecationLevel.HIDDEN)
-    public object Companion : Random() {
-        override fun nextBits(bitCount: Int): Int = Default.nextBits(bitCount)
     }
 }