remove some unnecessary !! from stdlib

libraries/stdlib/test/CollectionTest.kt

@@ -409,7 +409,7 @@ class CollectionTest {
         private val collection = collection
 
         override fun iterator(): Iterator<T> {
-            return collection.iterator()!!
+            return collection.iterator()
         }
     }
 }

libraries/stdlib/test/IoTest.kt

@@ -73,7 +73,7 @@ class IoTest() : TestCase() {
   }
   
   fun testListFiles() {
-    val dir = File.createTempFile("temp", System.nanoTime().toString())!!
+    val dir = File.createTempFile("temp", System.nanoTime().toString())
     dir.delete()
     dir.mkdir()
     
@@ -81,7 +81,7 @@ class IoTest() : TestCase() {
     File.createTempFile("temp", "2.java", dir)
     File.createTempFile("temp", "3.kt", dir)
     
-    val result = dir.listFiles { it.getName()!!.endsWith(".kt") }
+    val result = dir.listFiles { it.getName().endsWith(".kt") }
     
     assertNotNull(result)
     assertEquals(result!!.size, 2)

libraries/stdlib/test/concurrent/ThreadTest.kt

@@ -11,7 +11,7 @@ import java.util.concurrent.TimeUnit.*
 class ThreadTest {
     test fun scheduledTask() {
 
-        val pool = Executors.newFixedThreadPool(1)!!
+        val pool = Executors.newFixedThreadPool(1)
         val countDown = CountDownLatch(1)
         pool {
             countDown.countDown()
@@ -21,7 +21,7 @@ class ThreadTest {
 
     test fun callableInvoke() {
 
-        val pool = Executors.newFixedThreadPool(1)!!
+        val pool = Executors.newFixedThreadPool(1)
         val future = pool<String> {
             "Hello"
         }

libraries/stdlib/test/regressions/Kt2495Test.kt

@@ -14,7 +14,7 @@ fun f(xs: Iterator<Int>): Int {
 class Kt2495Test {
     test fun duplicateIteratorsBug() {
         val list = arrayList(1, 2, 3)
-        val result = f(list.iterator()!!)
+        val result = f(list.iterator())
         assertEquals(6, result)
     }
 }

libraries/stdlib/test/regressions/kt1202.kt

@@ -99,7 +99,7 @@ fun parseAtomic(tokens : Deque<Token>) : ParseResult<Expression> {
             else
                 Failure("Expecting ')'")
         }
-        is Number -> Success(Num(Integer.parseInt((token as Token).text)!!))
+        is Number -> Success(Num(Integer.parseInt((token as Token).text)))
         else -> Failure("Unexpected EOF")
     }
 }

libraries/stdlib/test/template/LocaleTemplateTest.kt

@@ -13,11 +13,11 @@ class LocaleTemplateTest : TestCase() {
     }
 
     fun testFrance() : Unit {
-        format(LocaleFormatter(Locale.FRANCE!!))
+        format(LocaleFormatter(Locale.FRANCE))
     }
 
     fun testGermany() : Unit {
-        format(LocaleFormatter(Locale.GERMANY!!))
+        format(LocaleFormatter(Locale.GERMANY))
     }
 
     fun format(formatter: LocaleFormatter): Unit {