Simplify default imports.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanPlatform.kt

@@ -63,13 +63,11 @@ class KonanBuiltIns(storageManager: StorageManager) : KotlinBuiltIns(storageMana
 
 object KonanPlatform : TargetPlatform("Konan") {
     override val multiTargetPlatform = MultiTargetPlatform.Specific(platformName)
-    override fun getDefaultImports(languageVersionSettings: LanguageVersionSettings): List<ImportPath> =
-            Default.getDefaultImports(languageVersionSettings) + listOf(
-                    ImportPath("kotlin.*"),
-                    ImportPath("kotlin.collections.*"),
-                    ImportPath("kotlin.io.*"),
-                    ImportPath("konan.*")
-            )
+    override fun getDefaultImports(languageVersionSettings: LanguageVersionSettings): List<ImportPath> {
+       return Default.getDefaultImports(languageVersionSettings) + listOf(
+                ImportPath("konan.*")
+        )
+    }
 
     override val platformConfigurator: PlatformConfigurator = KonanPlatformConfigurator
 

runtime/src/main/kotlin/kotlin/Comparable.kt

@@ -14,5 +14,3 @@ public interface Comparable<in T> {
     public operator fun compareTo(other: T): Int
 }
 
-typealias Comparator<T> = kotlin.comparisons.Comparator<T>
-