diff --git a/libraries/stdlib/src/kotlin/properties/delegation/Delegation.kt b/libraries/stdlib/src/kotlin/properties/delegation/Delegation.kt
deleted file mode 100644
index fe4dbb05a6d..00000000000
--- a/libraries/stdlib/src/kotlin/properties/delegation/Delegation.kt
+++ /dev/null
@@ -1,118 +0,0 @@
-package kotlin.properties.delegation
-
-import kotlin.properties.ChangeSupport
-
-public class NotNullVar<T: Any> {
-    private var value: T? = null
-
-    public fun get(thisRef: Any?, desc: PropertyMetadata): T {
-        return value ?: throw IllegalStateException("Property ${desc.name} should be initialized before get")
-    }
-
-    public fun set(thisRef: Any?, desc: PropertyMetadata, value: T) {
-        this.value = value
-    }
-}
-
-public class SynchronizedVar<T>(private val initValue: T, private val lock: Any) {
-    private var value: T = initValue
-
-    public fun get(thisRef: Any?, desc: PropertyMetadata): T {
-        return synchronized(lock) { value }
-    }
-
-    public fun set(thisRef: Any?, desc: PropertyMetadata, newValue: T) {
-        synchronized(lock) {
-            value = newValue
-        }
-    }
-}
-
-class ObservableProperty<T>(initialValue: T, val changeSupport: (name: String, oldValue: T, newValue: T) -> Unit) {
-    private var value = initialValue
-
-    public fun get(thisRef: Any?, desc: PropertyMetadata): T {
-        return value
-    }
-
-    public fun set(thisRef: Any?, desc: PropertyMetadata, newValue: T) {
-        changeSupport(desc.name, value, newValue)
-        value = newValue
-    }
-}
-
-public class KeyMissingException(message: String): RuntimeException(message)
-
-public abstract class MapVal<T, V> {
-    public abstract fun getMap(thisRef: T): Map<*, *>
-    public abstract fun getKey(desc: PropertyMetadata): Any?
-
-    public open fun getDefaultValue(desc: PropertyMetadata, key: Any?): V {
-        throw KeyMissingException("Key $key is missing")
-    }
-
-    public fun get(thisRef: T, desc: PropertyMetadata): V {
-        val key = getKey(desc)
-        val map = getMap(thisRef)
-        if (!map.containsKey(key)) {
-            return getDefaultValue(desc, key)
-        }
-        return map[key] as V
-    }
-}
-
-public abstract class MapVar<T, V>: MapVal<T, V>() {
-
-    public fun set(thisRef: T, desc: PropertyMetadata, newValue: V) {
-        val map = getMap(thisRef) as MutableMap<Any?, Any?>
-        map[getKey(desc)] = newValue
-    }
-}
-
-public fun <V> Map<String, *>.readOnlyProperty(default: (() -> V)? = null): MapVal<Any?, V> {
-    return object: MapVal<Any?, V>() {
-        override fun getMap(thisRef: Any?) = this@readOnlyProperty
-        override fun getKey(desc: PropertyMetadata) = desc.name
-        override fun getDefaultValue(desc: PropertyMetadata, key: Any?) = if (default == null) super.getDefaultValue(desc, key) else default()
-    }
-}
-
-public fun <V> Map<*, *>.readOnlyProperty(default: (() -> V)? = null, key: Any?): MapVal<Any?, V> {
-    return object: MapVal<Any?, V>() {
-        override fun getMap(thisRef: Any?) = this@readOnlyProperty
-        override fun getKey(desc: PropertyMetadata) = key
-        override fun getDefaultValue(desc: PropertyMetadata, key: Any?) = if (default == null) super.getDefaultValue(desc, key) else default()
-    }
-}
-
-public fun <V> Map<*, *>.readOnlyProperty(default: (() -> V)? = null, key: (desc: PropertyMetadata) -> Any?): MapVal<Any?, V> {
-    return object: MapVal<Any?, V>() {
-        override fun getMap(thisRef: Any?) = this@readOnlyProperty
-        override fun getKey(desc: PropertyMetadata) = key(desc)
-        override fun getDefaultValue(desc: PropertyMetadata, key: Any?) = if (default == null) super.getDefaultValue(desc, key) else default()
-    }
-}
-
-public fun <V> MutableMap<String, *>.property(default: (() -> V)? = null): MapVar<Any?, V> {
-    return object: MapVar<Any?, V>() {
-        override fun getMap(thisRef: Any?) = this@property
-        override fun getKey(desc: PropertyMetadata) = desc.name
-        override fun getDefaultValue(desc: PropertyMetadata, key: Any?) = if (default == null) super.getDefaultValue(desc, key) else default()
-    }
-}
-
-public fun <V> MutableMap<*, *>.property(default: (() -> V)? = null, key: Any?): MapVar<Any?, V> {
-    return object: MapVar<Any?, V>() {
-        override fun getMap(thisRef: Any?) = this@property
-        override fun getKey(desc: PropertyMetadata) = key
-        override fun getDefaultValue(desc: PropertyMetadata, key: Any?) = if (default == null) super.getDefaultValue(desc, key) else default()
-    }
-}
-
-public fun <V> MutableMap<*, *>.property(default: (() -> V)? = null, key: (desc: PropertyMetadata) -> Any?): MapVar<Any?, V> {
-    return object: MapVar<Any?, V>() {
-        override fun getMap(thisRef: Any?) = this@property
-        override fun getKey(desc: PropertyMetadata) = key(desc)
-        override fun getDefaultValue(desc: PropertyMetadata, key: Any?) = if (default == null) super.getDefaultValue(desc, key) else default()
-    }
-}
\ No newline at end of file
diff --git a/libraries/stdlib/src/kotlin/properties/delegation/lazy/LazyValues.kt b/libraries/stdlib/src/kotlin/properties/delegation/lazy/LazyValues.kt
deleted file mode 100644
index 2d0767446d3..00000000000
--- a/libraries/stdlib/src/kotlin/properties/delegation/lazy/LazyValues.kt
+++ /dev/null
@@ -1,75 +0,0 @@
-package kotlin.properties.delegation.lazy
-
-private val NULL_VALUE: Any = Any()
-
-private fun <T> escape(value: T): Any {
-    return if (value == null) NULL_VALUE else value
-}
-
-private fun <T: Any> unescape(value: Any): T? {
-    return if (value == NULL_VALUE) null else value as T
-}
-
-public open class LazyVal<T: Any>(initializer: () -> T): NullableLazyVal<T>(initializer) {
-    override fun get(thisRef: Any?, desc: PropertyMetadata): T {
-        return super.get(thisRef, desc)!!
-    }
-}
-
-public open class NullableLazyVal<T: Any>(private val initializer: () -> T?) {
-    private var value: Any? = null
-
-    public open fun get(thisRef: Any?, desc: PropertyMetadata): T? {
-        if (value == null) {
-            value = escape(initializer())
-        }
-        return unescape(value!!)
-    }
-}
-
-public open class VolatileLazyVal<T: Any>(initializer: () -> T): VolatileNullableLazyVal<T>(initializer) {
-    override fun get(thisRef: Any?, desc: PropertyMetadata): T {
-        return super.get(thisRef, desc)!!
-    }
-}
-
-public open class VolatileNullableLazyVal<T: Any>(private val initializer: () -> T?) {
-    private volatile var value: Any? = null
-
-    public open fun get(thisRef: Any?, desc: PropertyMetadata): T? {
-        if (value == null) {
-            value = escape(initializer())
-        }
-        return unescape(value!!)
-    }
-}
-
-public open class AtomicLazyVal<T: Any>(lock: Any? = null, initializer: () -> T): AtomicNullableLazyVal<T>(lock, initializer) {
-    override fun get(thisRef: Any?, desc: PropertyMetadata): T {
-        return super.get(thisRef, desc)!!
-    }
-}
-
-public open class AtomicNullableLazyVal<T: Any>(lock: Any? = null, private val initializer: () -> T?) {
-    private val lock = lock ?: this
-    private volatile var value: Any? = null
-
-    public open fun get(thisRef: Any?, desc: PropertyMetadata): T? {
-        val _v1 = value
-        if (_v1 != null) {
-            return unescape(_v1)
-        }
-
-        return synchronized(lock) {
-            val _v2 = value
-            if (_v2 != null) {
-                unescape<T>(_v2)
-            }
-            else {
-                val typedValue = initializer()
-                value = escape(typedValue)
-                typedValue
-            }
-        }
-    }
-}
\ No newline at end of file