Move Closeable to its usage, move internal Serializable to kotlin package in JS, introduce internal typealias in kotlin.io in JVM.

libraries/stdlib/src/kotlin/collections/Collections.kt

@@ -19,7 +19,6 @@
 
 package kotlin.collections
 
-import java.io.Serializable
 import java.util.*
 import kotlin.comparisons.compareValues
 

libraries/stdlib/src/kotlin/collections/Maps.kt

@@ -3,7 +3,6 @@
 
 package kotlin.collections
 
-import java.io.Serializable
 import java.util.*
 
 private object EmptyMap : Map<Any?, Nothing>, Serializable {

libraries/stdlib/src/kotlin/collections/Sets.kt

@@ -3,7 +3,6 @@
 
 package kotlin.collections
 
-import java.io.Serializable
 import java.util.*
 
 

libraries/stdlib/src/kotlin/io/Serializable.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+@file:JvmVersion
+package kotlin.io
+
+// to use in shared code without imports
+internal typealias Serializable = java.io.Serializable

libraries/stdlib/src/kotlin/util/Lazy.kt

@@ -2,7 +2,6 @@
 
 package kotlin
 
-import java.io.Serializable
 import kotlin.reflect.KProperty
 
 /**

libraries/stdlib/src/kotlin/util/Tuples.kt

@@ -1,7 +1,6 @@
 @file:kotlin.jvm.JvmName("TuplesKt")
 package kotlin
 
-import java.io.Serializable
 
 /**
  * Represents a generic pair of two values.