StdLib cleanup: remove unused imports

libraries/stdlib/test/DataClassTest.kt

@@ -2,7 +2,7 @@ package test.dataclass
 
 import org.junit.Test
 import kotlin.test.*
-import java.io.Serializable
+
 
 /**
  */

libraries/stdlib/test/DefaultIntrinsicObjectsJVMTest.kt

@@ -18,8 +18,6 @@ package test.numbers
 
 import kotlin.test.*
 
-import java.util.*
-import kotlin.test.*
 import org.junit.Test as test
 
 class CompanionObjectsExtensionsTest {

libraries/stdlib/test/ExceptionTest.kt

@@ -2,7 +2,6 @@ package test.collections
 
 import kotlin.test.*
 
-import java.util.*
 import org.junit.Test  as test
 import java.io.PrintWriter
 import java.io.*

libraries/stdlib/test/OldStdlibTest.kt

@@ -3,8 +3,6 @@ package test.collections
 import kotlin.*
 import kotlin.io.*
 import kotlin.test.*
-import java.util.*
-import java.io.*
 import org.junit.Test as test
 
 class OldStdlibTest() {

libraries/stdlib/test/collections/MapJVMTest.kt

@@ -1,8 +1,9 @@
 package test.collections
 
 import java.util.concurrent.ConcurrentHashMap
-import java.util.concurrent.ConcurrentMap
-import kotlin.test.*
+import kotlin.test.assertEquals
+import kotlin.test.assertFails
+import kotlin.test.expect
 import org.junit.Test as test
 
 class MapJVMTest {

libraries/stdlib/test/io/Files.kt

@@ -8,9 +8,7 @@ import java.util.HashSet
 import java.util.ArrayList
 import kotlin.io.walkBottomUp
 import kotlin.io.walkTopDown
-import kotlin.test.assertFalse
-import kotlin.test.assertNull
-import kotlin.test.assertTrue
+import kotlin.test.*
 
 class FilesTest {
 

libraries/stdlib/test/io/IOStreams.kt

@@ -4,7 +4,6 @@ import org.junit.Test as test
 import kotlin.test.*
 import java.io.Writer
 import java.io.BufferedReader
-import java.io.File
 
 class IOStreamsTest {
     @test fun testGetStreamOfFile() {

libraries/stdlib/test/properties/delegation/lazy/LazyValuesTest.kt

@@ -2,8 +2,7 @@ package test.properties.delegation.lazy
 
 import org.junit.Test as test
 import kotlin.properties.*
-import kotlin.test.assertNotNull
-import kotlin.test.assertTrue
+import kotlin.test.*
 
 class LazyValTest {
     var result = 0

libraries/stdlib/test/text/RegexJVMTest.kt

@@ -1,7 +1,6 @@
 package test.text
 
 import kotlin.test.*
-import kotlin.text.*
 import org.junit.Test as test