diff --git a/compiler/builtins-serializer/src/BuiltInsSerializer.kt b/compiler/builtins-serializer/src/BuiltInsSerializer.kt
index eb54fb6f23f..91d29e470a4 100644
--- a/compiler/builtins-serializer/src/BuiltInsSerializer.kt
+++ b/compiler/builtins-serializer/src/BuiltInsSerializer.kt
@@ -42,7 +42,6 @@ import org.jetbrains.jet.lang.descriptors.ModuleDescriptor
 import org.jetbrains.jet.lang.resolve.name.FqName
 import com.intellij.util.containers.ContainerUtil
 import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns
-import org.jetbrains.jet.lang.types.lang.BuiltInsPackageMigration
 import org.jetbrains.jet.utils.recursePostOrder
 
 public class BuiltInsSerializer(val out: PrintStream?) {
@@ -84,24 +83,6 @@ public class BuiltInsSerializer(val out: PrintStream?) {
         }
 
         for (fqName in ContainerUtil.mapNotNull(files) { it?.getPackageName() }.toSet()) {
-            if (fqName == "kotlin") {
-                BuiltInsPackageMigration.isSerializingBuiltInsInKotlinPackage = true
-                val provider = session.getDeclarationProviderFactory().getPackageMemberDeclarationProvider(FqName(fqName))!!
-
-                fun resolveClass(name: String): ClassDescriptor {
-                    val classes = provider.getClassOrObjectDeclarations(Name.identifier(name))
-                    assert(classes.size() == 1, "Class $name not found: " + classes)
-                    return session.getClassDescriptor(classes.iterator().next())
-                }
-                BuiltInsPackageMigration.anyType = resolveClass("Any").getDefaultType()
-                BuiltInsPackageMigration.stringType = resolveClass("String").getDefaultType()
-                BuiltInsPackageMigration.annotationType = resolveClass("Annotation").getDefaultType()
-                BuiltInsPackageMigration.arrayClass = resolveClass("Array")
-                BuiltInsPackageMigration.enumClass = resolveClass("Enum")
-            }
-            else {
-                BuiltInsPackageMigration.isSerializingBuiltInsInKotlinPackage = false
-            }
             serializePackage(module, FqName(fqName), destDir)
         }
 
diff --git a/core/descriptors/src/org/jetbrains/jet/lang/types/lang/BuiltInsPackageMigration.java b/core/descriptors/src/org/jetbrains/jet/lang/types/lang/BuiltInsPackageMigration.java
deleted file mode 100644
index 777df42cfc6..00000000000
--- a/core/descriptors/src/org/jetbrains/jet/lang/types/lang/BuiltInsPackageMigration.java
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright 2010-2014 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.
- */
-
-package org.jetbrains.jet.lang.types.lang;
-
-import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
-import org.jetbrains.jet.lang.types.JetType;
-
-// This is a temporary hack for migration of built-ins from package "jet" to "kotlin"
-public class BuiltInsPackageMigration {
-    public static boolean isSerializingBuiltInsInKotlinPackage = false;
-
-    public static JetType anyType = null;
-    public static JetType stringType = null;
-    public static JetType annotationType = null;
-    public static ClassDescriptor arrayClass = null;
-    public static ClassDescriptor enumClass = null;
-}
diff --git a/core/descriptors/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java b/core/descriptors/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java
index 36dc1611d4d..218d88058c0 100644
--- a/core/descriptors/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java
+++ b/core/descriptors/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java
@@ -291,9 +291,6 @@ public class KotlinBuiltIns {
 
     @NotNull
     public ClassDescriptor getArray() {
-        if (BuiltInsPackageMigration.isSerializingBuiltInsInKotlinPackage) {
-            return BuiltInsPackageMigration.arrayClass;
-        }
         return getBuiltInClassByName("Array");
     }
 
@@ -388,9 +385,6 @@ public class KotlinBuiltIns {
 
     @NotNull
     public ClassDescriptor getEnum() {
-        if (BuiltInsPackageMigration.isSerializingBuiltInsInKotlinPackage) {
-            return BuiltInsPackageMigration.enumClass;
-        }
         return getBuiltInClassByName("Enum");
     }
 
@@ -565,9 +559,6 @@ public class KotlinBuiltIns {
 
     @NotNull
     public JetType getAnyType() {
-        if (BuiltInsPackageMigration.isSerializingBuiltInsInKotlinPackage) {
-            return BuiltInsPackageMigration.anyType;
-        }
         return getBuiltInTypeByClassName("Any");
     }
 
@@ -639,9 +630,6 @@ public class KotlinBuiltIns {
 
     @NotNull
     public JetType getStringType() {
-        if (BuiltInsPackageMigration.isSerializingBuiltInsInKotlinPackage) {
-            return BuiltInsPackageMigration.stringType;
-        }
         return getBuiltInTypeByClassName("String");
     }
 
@@ -705,9 +693,6 @@ public class KotlinBuiltIns {
 
     @NotNull
     public JetType getAnnotationType() {
-        if (BuiltInsPackageMigration.isSerializingBuiltInsInKotlinPackage) {
-            return BuiltInsPackageMigration.annotationType;
-        }
         return getBuiltInTypeByClassName("Annotation");
     }