Get rid of deprecated annotations and modifiers in stdlib (besides JS)

libraries/stdlib/test/iterators/FunctionIteratorTest.kt

@@ -7,7 +7,8 @@ import org.junit.Test
 
 class FunctionIteratorTest {
 
-    Test fun iterateOverFunction() {
+    @Test
+    fun iterateOverFunction() {
         var count = 3
 
         val iter = sequence<Int> {
@@ -19,7 +20,8 @@ class FunctionIteratorTest {
         assertEquals(arrayListOf(2, 1, 0), list)
     }
 
-    Test fun iterateOverFunction2() {
+    @Test
+    fun iterateOverFunction2() {
         val values = sequence<Int>(3) { n -> if (n > 0) n - 1 else null }
         assertEquals(arrayListOf(3, 2, 1, 0), values.toList())
     }