Make Comparator fun interface in Common and JS

libraries/stdlib/common/src/kotlin/Comparator.kt

@@ -0,0 +1,18 @@
+/*
+ * 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.
+ */
+
+package kotlin
+
+/**
+ * Provides a comparison function for imposing a total ordering between instances of the type [T].
+ */
+public expect fun interface Comparator<T> {
+    /**
+     * Compares its two arguments for order. Returns zero if the arguments are equal,
+     * a negative number if the first argument is less than the second, or a positive number
+     * if the first argument is greater than the second.
+     */
+    public fun compare(a: T, b: T): Int
+}

libraries/stdlib/common/src/kotlin/KotlinH.kt

@@ -1,43 +1,10 @@
 /*
- * 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.
  */
 
 package kotlin
 
-import kotlin.annotation.AnnotationTarget.FIELD
-import kotlin.annotation.AnnotationTarget.PROPERTY
-
-
-/**
- * Provides a comparison function for imposing a total ordering between instances of the type [T].
- */
-expect interface Comparator<T> {
-    /**
-     * Compares its two arguments for order. Returns zero if the arguments are equal,
-     * a negative number if the first argument is less than the second, or a positive number
-     * if the first argument is greater than the second.
-     */
-    fun compare(a: T, b: T): Int
-}
-
-/**
- * Creates a [Comparator] with the provided [comparison] function.
- *
- * @param comparison function that compares its two arguments for order.
- * Must return zero if the arguments are equal, a negative number
- * if the first argument is less than the second, or a positive number
- * if the first argument is greater than the second.
- *
- * @return [Comparator] object with the provided implementation of the comparison function.
- */
-// TODO: Satisfied with SAM-constructor for Comparator interface in JVM
-@Suppress("NO_ACTUAL_FOR_EXPECT")
-expect inline fun <T> Comparator(crossinline comparison: (a: T, b: T) -> Int): Comparator<T>
-
-// From kotlin.kt
-
-
 
 // From numbers.kt