Remove 'import java.util' from js tests.

js/js.translator/testData/box/multideclaration/multiValForMap.kt

@@ -1,6 +1,5 @@
 package foo
 
-import java.util.HashMap
 
 
 operator fun <K, V> Map<K, V>.iterator(): Iterator<Map.Entry<K, V>> {

js/js.translator/testData/box/multideclaration/multiValInFor.kt

@@ -1,6 +1,5 @@
 package foo
 
-import java.util.ArrayList
 
 class A {
     operator fun component1(): Int = 1
@@ -8,7 +7,7 @@ class A {
 operator fun A.component2(): String = "n"
 
 fun box(): String {
-    val list = ArrayList<A>()
+    val list = mutableListOf<A>()
     list.add(A())
 
     var i = 0;