Drop Throwable#printStackTrace, make it a JVM-specific extension

core/builtins/native/kotlin/Throwable.kt

@@ -23,14 +23,9 @@ package kotlin
  * @param cause the cause of this throwable.
  */
 public open class Throwable(val message: String?, val cause: Throwable?) {
-
     constructor(message: String?) : this(message, null)
 
     constructor(cause: Throwable?) : this(cause?.toString(), cause)
 
     constructor() : this(null, null)
-    /**
-     * Prints the stack trace of this throwable to the standard output.
-     */
-    public fun printStackTrace(): Unit
 }