diff --git a/idea/testData/copyPaste/imports/DependencyOnStdLib.expected.kt b/idea/testData/copyPaste/imports/DependencyOnStdLib.expected.kt
index 5f2a0f5472c..89767829ef2 100644
--- a/idea/testData/copyPaste/imports/DependencyOnStdLib.expected.kt
+++ b/idea/testData/copyPaste/imports/DependencyOnStdLib.expected.kt
@@ -1,5 +1,5 @@
 package to
 
-import kotlin.concurrent.FunctionalList
+import kotlin.properties.ObservableProperty
 
-fun f(l: FunctionalList<Int>) {}
\ No newline at end of file
+fun f(l: ObservableProperty<Int>) {}
\ No newline at end of file
diff --git a/idea/testData/copyPaste/imports/DependencyOnStdLib.expected.names b/idea/testData/copyPaste/imports/DependencyOnStdLib.expected.names
index 1e28860500b..2a89ec4170a 100644
--- a/idea/testData/copyPaste/imports/DependencyOnStdLib.expected.names
+++ b/idea/testData/copyPaste/imports/DependencyOnStdLib.expected.names
@@ -1,2 +1,2 @@
 kotlin.Int
-kotlin.concurrent.FunctionalList
+kotlin.properties.ObservableProperty
diff --git a/idea/testData/copyPaste/imports/DependencyOnStdLib.kt b/idea/testData/copyPaste/imports/DependencyOnStdLib.kt
index 4c5c5306087..73104657ebc 100644
--- a/idea/testData/copyPaste/imports/DependencyOnStdLib.kt
+++ b/idea/testData/copyPaste/imports/DependencyOnStdLib.kt
@@ -2,6 +2,6 @@
 
 package g
 
-import kotlin.concurrent.FunctionalList
+import kotlin.properties.ObservableProperty
 
-<selection>fun f(l: FunctionalList<Int>) {}</selection>
\ No newline at end of file
+<selection>fun f(l: ObservableProperty<Int>) {}</selection>
\ No newline at end of file
diff --git a/idea/testData/intentions/insertExplicitTypeArguments/insertImportForArg.kt b/idea/testData/intentions/insertExplicitTypeArguments/insertImportForArg.kt
index 10e3f0aff50..ab3c5d372c9 100644
--- a/idea/testData/intentions/insertExplicitTypeArguments/insertImportForArg.kt
+++ b/idea/testData/intentions/insertExplicitTypeArguments/insertImportForArg.kt
@@ -1,4 +1,4 @@
-fun foo(c: kotlin.support.AbstractIterator<kotlin.concurrent.FunctionalList<Int>>) {
+fun foo(c: kotlin.support.AbstractIterator<kotlin.properties.ObservableProperty<Int>>) {
     ba<caret>r(c)
 }
 
diff --git a/idea/testData/intentions/insertExplicitTypeArguments/insertImportForArg.kt.after b/idea/testData/intentions/insertExplicitTypeArguments/insertImportForArg.kt.after
index 1e09c2b3b66..2e636643e12 100644
--- a/idea/testData/intentions/insertExplicitTypeArguments/insertImportForArg.kt.after
+++ b/idea/testData/intentions/insertExplicitTypeArguments/insertImportForArg.kt.after
@@ -1,8 +1,8 @@
-import kotlin.concurrent.FunctionalList
+import kotlin.properties.ObservableProperty
 import kotlin.support.AbstractIterator
 
-fun foo(c: kotlin.support.AbstractIterator<kotlin.concurrent.FunctionalList<Int>>) {
-    bar<AbstractIterator<FunctionalList<Int>>>(c)
+fun foo(c: kotlin.support.AbstractIterator<kotlin.properties.ObservableProperty<Int>>) {
+    bar<AbstractIterator<ObservableProperty<Int>>>(c)
 }
 
 fun <T> bar(t: T): T = t
diff --git a/libraries/stdlib/src/kotlin/concurrent/FunctionalList.kt b/libraries/stdlib/src/kotlin/concurrent/FunctionalList.kt
deleted file mode 100644
index e54a6e9e583..00000000000
--- a/libraries/stdlib/src/kotlin/concurrent/FunctionalList.kt
+++ /dev/null
@@ -1,57 +0,0 @@
-package kotlin.concurrent
-
-deprecated("This class is unfinished work. It will be removed from the standard library and replaced by a separate persistent collections library")
-public abstract class FunctionalList<T>(public val size: Int) {
-    public abstract val head: T
-    public abstract val tail: FunctionalList<T>
-
-    public val empty: Boolean
-        get() = size == 0
-
-    public fun add(element: T): FunctionalList<T> = FunctionalList.Standard(element, this)
-
-    public fun reversed(): FunctionalList<T> {
-        if(empty)
-            return this
-
-        var cur = tail
-        var new = of(head)
-
-        while(!cur.empty) {
-            new = new.add(cur.head)
-            cur = cur.tail
-        }
-        return new
-    }
-
-    public fun iterator() : Iterator<T> = object: Iterator<T> {
-        var cur = this@FunctionalList
-
-        public override fun next(): T {
-            if(cur.empty)
-                throw java.util.NoSuchElementException()
-
-            val head = cur.head
-            cur = cur.tail
-            return head
-        }
-
-        override fun hasNext(): Boolean = !cur.empty
-    }
-
-    private class Empty<T>() : FunctionalList<T>(0) {
-        override val head: T
-            get() = throw java.util.NoSuchElementException()
-        override val tail: FunctionalList<T>
-            get() = throw java.util.NoSuchElementException()
-    }
-
-    private class Standard<T>(override val head: T, override val tail: FunctionalList<T>) : FunctionalList<T>(tail.size + 1)
-
-    companion object {
-        public fun <T> emptyList(): FunctionalList<T> = Empty<T>()
-
-        public fun <T> of(element: T): FunctionalList<T> = FunctionalList.Standard<T>(element, emptyList())
-    }
-}
-
diff --git a/libraries/stdlib/src/kotlin/concurrent/FunctionalQueue.kt b/libraries/stdlib/src/kotlin/concurrent/FunctionalQueue.kt
deleted file mode 100644
index 5e51e1cbe26..00000000000
--- a/libraries/stdlib/src/kotlin/concurrent/FunctionalQueue.kt
+++ /dev/null
@@ -1,31 +0,0 @@
-package kotlin.concurrent
-
-import java.util.concurrent.Executor
-
-deprecated("This class is unfinished work. It will be removed from the standard library and replaced by a separate persistent collections library")
-public class FunctionalQueue<T> (
-        private val input: FunctionalList<T> = FunctionalList.emptyList<T>(),
-        private val output: FunctionalList<T> = FunctionalList.emptyList<T>()
-) {
-
-    public val size: Int
-        get() = input.size + output.size
-
-    public val empty: Boolean
-        get() = size == 0
-
-    public fun add(element: T): FunctionalQueue<T> = FunctionalQueue<T>(input add element, output)
-
-    public fun addFirst(element: T): FunctionalQueue<T> = FunctionalQueue<T>(input, output add element)
-
-    public fun removeFirst(): Pair<T, FunctionalQueue<T>> =
-            if (output.empty) {
-                if (input.empty)
-                    throw java.util.NoSuchElementException()
-                else
-                    FunctionalQueue<T>(FunctionalList.emptyList<T>(), input.reversed()).removeFirst()
-            }
-            else {
-                Pair(output.head, FunctionalQueue<T>(input, output.tail))
-            }
-}
diff --git a/libraries/stdlib/test/concurrent/FListTest.kt b/libraries/stdlib/test/concurrent/FListTest.kt
deleted file mode 100644
index fbc89746f6a..00000000000
--- a/libraries/stdlib/test/concurrent/FListTest.kt
+++ /dev/null
@@ -1,16 +0,0 @@
-package test.concurrent
-
-import kotlin.concurrent.*
-import junit.framework.*
-
-class FListTest() : TestCase() {
-    fun testEmpty() {
-        val empty = FunctionalQueue<Int> ()
-        Assert.assertTrue(empty.empty)
-    }
-
-    fun testNonEmpty() {
-//        val empty = FunctionalList.emptyList<Int> ()
-//        assertTrue(!(empty + 10).empty)
-    }
-}