Remove java.util.* imports from common code.

libraries/stdlib/test/collections/ArraysTest.kt

@@ -18,7 +18,6 @@ package test.collections
 
 import test.collections.behaviors.listBehavior
 import test.comparisons.STRING_CASE_INSENSITIVE_ORDER
-import java.util.*
 import kotlin.test.*
 import org.junit.Test as test
 import kotlin.comparisons.*

libraries/stdlib/test/collections/CollectionTest.kt

@@ -16,7 +16,6 @@
 
 package test.collections
 
-import java.util.*
 import kotlin.test.*
 import org.junit.Test as test
 import test.collections.behaviors.*

libraries/stdlib/test/collections/MapTest.kt

@@ -1,6 +1,5 @@
 package test.collections
 
-import java.util.*
 import kotlin.test.*
 import org.junit.Test as test
 

libraries/stdlib/test/collections/MutableCollectionsTest.kt

@@ -2,8 +2,6 @@ package test.collections
 
 import kotlin.test.*
 
-import java.util.*
-
 import org.junit.Test as test
 
 class MutableCollectionTest {

libraries/stdlib/test/collections/SequenceTest.kt

@@ -3,7 +3,6 @@ package test.collections
 import org.junit.Test as test
 import org.junit.Test
 import kotlin.test.*
-import java.util.*
 import kotlin.comparisons.*
 
 fun fibonacci(): Sequence<Int> {